Finding the Fourth Proportional to 129,171.57, 193,801.10 and 58,086.78

Step by Step Solution

1. Step 1: Write the proportion equation
   129,171.57 : 193,801.10 = 58,086.78 : x
2. Step 2: Convert to fraction form
   129,171.57/193,801.10 = 58,086.78/x
3. Step 3: Cross multiply
   129,171.57x = 193,801.10 × 58,086.78
4. Step 4: Simplify right side
   129,171.57x = 11,257,281,569.02
5. Step 5: Solve for x
   x = 11,257,281,569.02/129,171.57
6. Step 6: Final answer
   x = 87,149.84