Finding the Fourth Proportional to 426,131.57, 638,373.10 and 356,921.42

Step by Step Solution

1. Step 1: Write the proportion equation
   426,131.57 : 638,373.10 = 356,921.42 : x
2. Step 2: Convert to fraction form
   426,131.57/638,373.10 = 356,921.42/x
3. Step 3: Cross multiply
   426,131.57x = 638,373.10 × 356,921.42
4. Step 4: Simplify right side
   426,131.57x = 227,849,033,517.71
5. Step 5: Solve for x
   x = 227,849,033,517.71/426,131.57
6. Step 6: Final answer
   x = 534,691.75