Finding the Fourth Proportional to 219,501.32, 329,025.98 and 86,327.60

Step by Step Solution

1. Step 1: Write the proportion equation
   219,501.32 : 329,025.98 = 86,327.60 : x
2. Step 2: Convert to fraction form
   219,501.32/329,025.98 = 86,327.60/x
3. Step 3: Cross multiply
   219,501.32x = 329,025.98 × 86,327.60
4. Step 4: Simplify right side
   219,501.32x = 28,404,023,191.05
5. Step 5: Solve for x
   x = 28,404,023,191.05/219,501.32
6. Step 6: Final answer
   x = 129,402.52