Finding the Fourth Proportional to 656,417.87, 905,667.71 and 427,312.34

Step by Step Solution

1. Step 1: Write the proportion equation
   656,417.87 : 905,667.71 = 427,312.34 : x
2. Step 2: Convert to fraction form
   656,417.87/905,667.71 = 427,312.34/x
3. Step 3: Cross multiply
   656,417.87x = 905,667.71 × 427,312.34
4. Step 4: Simplify right side
   656,417.87x = 387,002,981,757.64
5. Step 5: Solve for x
   x = 387,002,981,757.64/656,417.87
6. Step 6: Final answer
   x = 589,568.02