Finding the Fourth Proportional to 86,587.39, 129,922.17 and 59,974.30

Step by Step Solution

1. Step 1: Write the proportion equation
   86,587.39 : 129,922.17 = 59,974.30 : x
2. Step 2: Convert to fraction form
   86,587.39/129,922.17 = 59,974.30/x
3. Step 3: Cross multiply
   86,587.39x = 129,922.17 × 59,974.30
4. Step 4: Simplify right side
   86,587.39x = 7,791,991,200.23
5. Step 5: Solve for x
   x = 7,791,991,200.23/86,587.39
6. Step 6: Final answer
   x = 89,989.91