ASA 10U rec (just to explain why this happened in the first place)
Runner on 1st. Batter hits a ground ball up the middle that the centerfielder bobbles. The runner from 1st rounds 2nd and is obstructed by the SS who is standing on the base. The umpire's arm goes up and the runner continues to 3rd. The runner makes it to 3rd ahead of the throw, but overruns 3rd and is tagged by the 3rd baseman.
Is the runner safe and placed on 3rd or is she out because she was only protected to 3rd base?