Finding the Fourth Proportional to 87,298.88, 120,543.52 and 71,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   87,298.88 : 120,543.52 = 71,168.72 : x
2. Step 2: Convert to fraction form
   87,298.88/120,543.52 = 71,168.72/x
3. Step 3: Cross multiply
   87,298.88x = 120,543.52 × 71,168.72
4. Step 4: Simplify right side
   87,298.88x = 8,578,928,022.69
5. Step 5: Solve for x
   x = 8,578,928,022.69/87,298.88
6. Step 6: Final answer
   x = 98,270.77