Finding the Fourth Proportional to 309,820.94, 464,753.61 and 129,725.15

Step by Step Solution

1. Step 1: Write the proportion equation
   309,820.94 : 464,753.61 = 129,725.15 : x
2. Step 2: Convert to fraction form
   309,820.94/464,753.61 = 129,725.15/x
3. Step 3: Cross multiply
   309,820.94x = 464,753.61 × 129,725.15
4. Step 4: Simplify right side
   309,820.94x = 60,290,231,770.29
5. Step 5: Solve for x
   x = 60,290,231,770.29/309,820.94
6. Step 6: Final answer
   x = 194,597.02