Finding the Fourth Proportional to 86,433.89, 129,692.76 and 39,081.71

Step by Step Solution

1. Step 1: Write the proportion equation
   86,433.89 : 129,692.76 = 39,081.71 : x
2. Step 2: Convert to fraction form
   86,433.89/129,692.76 = 39,081.71/x
3. Step 3: Cross multiply
   86,433.89x = 129,692.76 × 39,081.71
4. Step 4: Simplify right side
   86,433.89x = 5,068,614,835.42
5. Step 5: Solve for x
   x = 5,068,614,835.42/86,433.89
6. Step 6: Final answer
   x = 58,641.52