Finding the Fourth Proportional to 658,047.30, 908,105.61 and 356,241.30

Step by Step Solution

1. Step 1: Write the proportion equation
   658,047.30 : 908,105.61 = 356,241.30 : x
2. Step 2: Convert to fraction form
   658,047.30/908,105.61 = 356,241.30/x
3. Step 3: Cross multiply
   658,047.30x = 908,105.61 × 356,241.30
4. Step 4: Simplify right side
   658,047.30x = 323,504,723,043.69
5. Step 5: Solve for x
   x = 323,504,723,043.69/658,047.30
6. Step 6: Final answer
   x = 491,613.18