Finding the Fourth Proportional to 134,520.50, 185,575.92 and 86,789.18

Step by Step Solution

1. Step 1: Write the proportion equation
   134,520.50 : 185,575.92 = 86,789.18 : x
2. Step 2: Convert to fraction form
   134,520.50/185,575.92 = 86,789.18/x
3. Step 3: Cross multiply
   134,520.50x = 185,575.92 × 86,789.18
4. Step 4: Simplify right side
   134,520.50x = 16,105,981,924.55
5. Step 5: Solve for x
   x = 16,105,981,924.55/134,520.50
6. Step 6: Final answer
   x = 119,728.83