Finding the Third Proportional to 172,012 and 404,728

Step by Step Solution

1. Step 1: Write the proportion equation
   172,012 : 404,728 = 404,728 : x
2. Step 2: Convert to fraction form
   172,012/404,728 = 404,728/x
3. Step 3: Cross multiply
   172,012x = 404,728 × 404,728
4. Step 4: Simplify right side
   172,012x = 163,804,753,984
5. Step 5: Solve for x
   x = 163,804,753,984/172,012
6. Step 6: Final answer
   x = 952,286.78