Call Bottom Cell

I want to be able to call the bottom number in a set of data that is ever expanding. I don't really know how else to describe it , so I will give an example.

Say I have:
3
6
4

I would want to be able to call 4, but then if I had:
3
6
4
5

I would want to be able to call 5, and so on. Is there any simple way of doing this? I basically want the maximum cell name, and the corresponding data inside of it. Thanks!