Finding the Fourth Proportional to 80,718.56, 111,325.30 and 71,650.56

Step by Step Solution

1. Step 1: Write the proportion equation
   80,718.56 : 111,325.30 = 71,650.56 : x
2. Step 2: Convert to fraction form
   80,718.56/111,325.30 = 71,650.56/x
3. Step 3: Cross multiply
   80,718.56x = 111,325.30 × 71,650.56
4. Step 4: Simplify right side
   80,718.56x = 7,976,520,087.17
5. Step 5: Solve for x
   x = 7,976,520,087.17/80,718.56
6. Step 6: Final answer
   x = 98,818.91