Finding the Fourth Proportional to 657,724, 907,665.60 and 355,924.48

Step by Step Solution

1. Step 1: Write the proportion equation
   657,724 : 907,665.60 = 355,924.48 : x
2. Step 2: Convert to fraction form
   657,724/907,665.60 = 355,924.48/x
3. Step 3: Cross multiply
   657,724x = 907,665.60 × 355,924.48
4. Step 4: Simplify right side
   657,724x = 323,060,406,693.89
5. Step 5: Solve for x
   x = 323,060,406,693.89/657,724
6. Step 6: Final answer
   x = 491,179.29