6,732
Explanation:
First you put the numbers on top of each other.
I have:
513
24,300
6,732
89.3
5.43
Like that, lets see the three in 5.43 and 89.3 are tenths and hundreds so let those go.
513
24,300
6,732
Now go to the tens place, we need the three in to move one place to the left the only number that did that is 6,732, so there is your answer.