Answer Happy

Can someone please help me with PART C?
I don't know why the answer I got is wrong.
In the figure particle 1 of charge +q and particle 2 of charge +9q are held at separation L = 10.1 cm on an x axis. If particle 3 of charge 93 is to be located such that the three particles remain in place when released, what must be the (a) x and (b) y coordinates of particle 3 and (c) the ratio 93/q? 1-7 (a) Numbef72.53 (b) Numberto Units1 cm (c) Number 10.563 Units No units