Finding the Third Proportional to 63,720 and 89,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,720 : 89,122.50 = 89,122.50 : x
2. Step 2: Convert to fraction form
   63,720/89,122.50 = 89,122.50/x
3. Step 3: Cross multiply
   63,720x = 89,122.50 × 89,122.50
4. Step 4: Simplify right side
   63,720x = 7,942,820,006.25
5. Step 5: Solve for x
   x = 7,942,820,006.25/63,720
6. Step 6: Final answer
   x = 124,651.91