Finding the Fourth Proportional to 94,411.47, 142,134.02 and 86,144.61

Step by Step Solution

1. Step 1: Write the proportion equation
   94,411.47 : 142,134.02 = 86,144.61 : x
2. Step 2: Convert to fraction form
   94,411.47/142,134.02 = 86,144.61/x
3. Step 3: Cross multiply
   94,411.47x = 142,134.02 × 86,144.61
4. Step 4: Simplify right side
   94,411.47x = 12,244,079,720.63
5. Step 5: Solve for x
   x = 12,244,079,720.63/94,411.47
6. Step 6: Final answer
   x = 129,688.48