4500
It's already there.
It is 4500, exactly as in the question.
4500
4500
4500
4500 can be rounded only to 4500 to the nearest 100.
To the nearest hundred, 4500
4500
4500
4500
4500
It is then: 4500
4500 can be rounded only to 4500 to the nearest 100.
To the nearest hundred, 4500
4500
4540
4500
4500
4496 rounded to the nearest 100 is 4500.