Finding the Fourth Proportional to 657,903.72, 907,909.86 and 356,097.72

Step by Step Solution

1. Step 1: Write the proportion equation
   657,903.72 : 907,909.86 = 356,097.72 : x
2. Step 2: Convert to fraction form
   657,903.72/907,909.86 = 356,097.72/x
3. Step 3: Cross multiply
   657,903.72x = 907,909.86 × 356,097.72
4. Step 4: Simplify right side
   657,903.72x = 323,304,631,111.52
5. Step 5: Solve for x
   x = 323,304,631,111.52/657,903.72
6. Step 6: Final answer
   x = 491,416.33