Finding the Fourth Proportional to 623,914.77, 861,002.42 and 337,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   623,914.77 : 861,002.42 = 337,434.78 : x
2. Step 2: Convert to fraction form
   623,914.77/861,002.42 = 337,434.78/x
3. Step 3: Cross multiply
   623,914.77x = 861,002.42 × 337,434.78
4. Step 4: Simplify right side
   623,914.77x = 290,532,162,172.17
5. Step 5: Solve for x
   x = 290,532,162,172.17/623,914.77
6. Step 6: Final answer
   x = 465,660.02