fishing wire from second floor to garage in first floor
I think that using a spade type of bit there will be really tough going. I would use a regular twist bit. Possibly two if it is really tough going - e.g., 1/2" first and then followup with a 1" through the 1/2" starter hole.

If you have access to do so, it may be easier to drill from the bottom up than from the top down because the hole will empty itself thanks to gravity.