Finding the Third Proportional to 72,960.75 and 80,569.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,960.75 : 80,569.69 = 80,569.69 : x
2. Step 2: Convert to fraction form
   72,960.75/80,569.69 = 80,569.69/x
3. Step 3: Cross multiply
   72,960.75x = 80,569.69 × 80,569.69
4. Step 4: Simplify right side
   72,960.75x = 6,491,474,543.85
5. Step 5: Solve for x
   x = 6,491,474,543.85/72,960.75
6. Step 6: Final answer
   x = 88,972.15