Finding the Fourth Proportional to 158,602.50, 218,890.89 and 91,534.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,602.50 : 218,890.89 = 91,534.50 : x
2. Step 2: Convert to fraction form
   158,602.50/218,890.89 = 91,534.50/x
3. Step 3: Cross multiply
   158,602.50x = 218,890.89 × 91,534.50
4. Step 4: Simplify right side
   158,602.50x = 20,036,068,170.71
5. Step 5: Solve for x
   x = 20,036,068,170.71/158,602.50
6. Step 6: Final answer
   x = 126,328.83