Finding the Fourth Proportional to 656,325, 905,729.31 and 354,519

Step by Step Solution

1. Step 1: Write the proportion equation
   656,325 : 905,729.31 = 354,519 : x
2. Step 2: Convert to fraction form
   656,325/905,729.31 = 354,519/x
3. Step 3: Cross multiply
   656,325x = 905,729.31 × 354,519
4. Step 4: Simplify right side
   656,325x = 321,098,249,251.89
5. Step 5: Solve for x
   x = 321,098,249,251.89/656,325
6. Step 6: Final answer
   x = 489,236.66