Finding the Fourth Proportional to 158,150.72, 218,246.05 and 86,529.72

Step by Step Solution

1. Step 1: Write the proportion equation
   158,150.72 : 218,246.05 = 86,529.72 : x
2. Step 2: Convert to fraction form
   158,150.72/218,246.05 = 86,529.72/x
3. Step 3: Cross multiply
   158,150.72x = 218,246.05 × 86,529.72
4. Step 4: Simplify right side
   158,150.72x = 18,884,769,597.61
5. Step 5: Solve for x
   x = 18,884,769,597.61/158,150.72
6. Step 6: Final answer
   x = 119,409.95