Once Indra was returning from sage Bhrushundi’s ashram..While passing over the kingdom of king Shursen Indra found that his vimaan(plane) had stopped working and it landed in Shursen’s kingdom. He found that this happened because one person(who has done many sins in his life) saw his vimaan in the sky. With his sinful look the plane landed on the ground. This news spread like a fire in the city. All the efforts to restart the plane were failed. Indra told the secret to restart the plane to King .He said that yesterday was the Chaturthi tithi and if a any person who kept fast yesterday gave his virtue then the plane would start. King ordered his soldiers to search for such person who kept fast on chaturthi date. But there he found no one in the city. At the same time the soldiers of the king noticed that the attendant of Lord Ganesha was taking away the dead body of a woman who died on that day. With surprise soldiers asked the attendant of Lord Ganesha that the lady was a sinner and why they are taking her to Ganesh Lok. He replied that yesterday the woman remained hungry through out the (though unintentionally) and ate very late night. So accidently she kept the fast of Chaturthi tithi.But she died today. So she was going to Ganesh Lokam due to her virtues acquired on chaturthi tithi.
All of a sudden strong wind started to blew which reached from the dead body of the woman till the vimaan of Indra and the vimaan had started. So the wind became virtuous even with the touch of that woman.
Such is an importanceof sankata chaturthi which is dedicated to Lord Ganesha who is the ruler deity of Chaturthi tithi.