Finding the Fourth Proportional to 615,281.55, 849,088.72 and 339,639.59

Step by Step Solution

1. Step 1: Write the proportion equation
   615,281.55 : 849,088.72 = 339,639.59 : x
2. Step 2: Convert to fraction form
   615,281.55/849,088.72 = 339,639.59/x
3. Step 3: Cross multiply
   615,281.55x = 849,088.72 × 339,639.59
4. Step 4: Simplify right side
   615,281.55x = 288,384,144,734.43
5. Step 5: Solve for x
   x = 288,384,144,734.43/615,281.55
6. Step 6: Final answer
   x = 468,702.73