Finding the Fourth Proportional to 308,938.32, 426,314.25 and 172,949.31

Step by Step Solution

1. Step 1: Write the proportion equation
   308,938.32 : 426,314.25 = 172,949.31 : x
2. Step 2: Convert to fraction form
   308,938.32/426,314.25 = 172,949.31/x
3. Step 3: Cross multiply
   308,938.32x = 426,314.25 × 172,949.31
4. Step 4: Simplify right side
   308,938.32x = 73,730,755,380.67
5. Step 5: Solve for x
   x = 73,730,755,380.67/308,938.32
6. Step 6: Final answer
   x = 238,658.50