Finding the Fourth Proportional to 86,116.41, 129,104.90 and 26,921.61

Step by Step Solution

1. Step 1: Write the proportion equation
   86,116.41 : 129,104.90 = 26,921.61 : x
2. Step 2: Convert to fraction form
   86,116.41/129,104.90 = 26,921.61/x
3. Step 3: Cross multiply
   86,116.41x = 129,104.90 × 26,921.61
4. Step 4: Simplify right side
   86,116.41x = 3,475,711,766.89
5. Step 5: Solve for x
   x = 3,475,711,766.89/86,116.41
6. Step 6: Final answer
   x = 40,360.62