In order to find the expanded form, you have to expand the numbers out in order to solve the problem.
347,392 is the number given.
The first number is 3: 300,000
The second number is 4: 40,000
The third number is 7: 7,000
The fourth number is 3: 300
The fifth number is 9: 90
The sixth and final number is 2: 2
Therefore, the work above is the answer.