Answer: 34,651
Step-by-step explanation:
Given number : 42,780
Here the place value of 4 is 40,000 or 4 ten thousand.
Let's check all the optins for the right answer.
The value of 4 in 34,651 is 4,000 or 4 thousand
and 
Thus, 34,651 is the number in which the value of 4 is 10 times the value of 4 in 42,780.
