Finding the Fourth Proportional to 657,900.72, 907,905.73 and 356,094.72

Step by Step Solution

1. Step 1: Write the proportion equation
   657,900.72 : 907,905.73 = 356,094.72 : x
2. Step 2: Convert to fraction form
   657,900.72/907,905.73 = 356,094.72/x
3. Step 3: Cross multiply
   657,900.72x = 907,905.73 × 356,094.72
4. Step 4: Simplify right side
   657,900.72x = 323,300,436,710.75
5. Step 5: Solve for x
   x = 323,300,436,710.75/657,900.72
6. Step 6: Final answer
   x = 491,412.19