Question 161305
Let's break the number 9173 down into parts...

4500 + 4500 = 9000...leaving 173 to go
85 + 85 = 170...leaving 3 to go
1 + 2 = 3...leaving 0 to go

So add up in a vertical formation...

4500 + 85 + 1 = 4586
4500 + 85 + 2 = 4587

Those are your two consecutive numbers that add up to 9173 :)