Finding the Fourth Proportional to 92,707.59, 139,756.24 and 86,528.16

Step by Step Solution

1. Step 1: Write the proportion equation
   92,707.59 : 139,756.24 = 86,528.16 : x
2. Step 2: Convert to fraction form
   92,707.59/139,756.24 = 86,528.16/x
3. Step 3: Cross multiply
   92,707.59x = 139,756.24 × 86,528.16
4. Step 4: Simplify right side
   92,707.59x = 12,092,850,118.98
5. Step 5: Solve for x
   x = 12,092,850,118.98/92,707.59
6. Step 6: Final answer
   x = 130,440.78