Consider the numbers 23,643 and 23,987.
Since both the given numbers have same digits at ten thousands and thousands place.
So, we can'not compare the numbers on the basis of ten thousands and thousands digit.
So, let us consider the number 23,643
Consider the place value of digit at the hundreds place. Since, the digit at hundreds place = 6.
The place value of 6 = 600
Now, let us consider the number 23,987
Consider the place value of digit at the hundreds place. Since, the digit at hundreds place = 9.
Te place value of 9 = 900
Since, 900 > 600
So, 23,643 > 23,987
Therefore, the number 23,987 is greater than the number 23,643.