Finding the Fourth Proportional to 86,672.30, 129,786.50 and 59,981.33

Step by Step Solution

1. Step 1: Write the proportion equation
   86,672.30 : 129,786.50 = 59,981.33 : x
2. Step 2: Convert to fraction form
   86,672.30/129,786.50 = 59,981.33/x
3. Step 3: Cross multiply
   86,672.30x = 129,786.50 × 59,981.33
4. Step 4: Simplify right side
   86,672.30x = 7,784,766,586.14
5. Step 5: Solve for x
   x = 7,784,766,586.14/86,672.30
6. Step 6: Final answer
   x = 89,818.40