Finding the Fourth Proportional to 231,059.39, 318,850.56 and 129,064.59

Step by Step Solution

1. Step 1: Write the proportion equation
   231,059.39 : 318,850.56 = 129,064.59 : x
2. Step 2: Convert to fraction form
   231,059.39/318,850.56 = 129,064.59/x
3. Step 3: Cross multiply
   231,059.39x = 318,850.56 × 129,064.59
4. Step 4: Simplify right side
   231,059.39x = 41,152,316,797.67
5. Step 5: Solve for x
   x = 41,152,316,797.67/231,059.39
6. Step 6: Final answer
   x = 178,102.77