Finding the Fourth Proportional to 157,951.34, 217,978.71 and 86,336.18

Step by Step Solution

1. Step 1: Write the proportion equation
   157,951.34 : 217,978.71 = 86,336.18 : x
2. Step 2: Convert to fraction form
   157,951.34/217,978.71 = 86,336.18/x
3. Step 3: Cross multiply
   157,951.34x = 217,978.71 × 86,336.18
4. Step 4: Simplify right side
   157,951.34x = 18,819,449,142.73
5. Step 5: Solve for x
   x = 18,819,449,142.73/157,951.34
6. Step 6: Final answer
   x = 119,147.13