Finding the Third Proportional to 74,851.50 and 99,640.50

Step by Step Solution

1. Step 1: Write the proportion equation
   74,851.50 : 99,640.50 = 99,640.50 : x
2. Step 2: Convert to fraction form
   74,851.50/99,640.50 = 99,640.50/x
3. Step 3: Cross multiply
   74,851.50x = 99,640.50 × 99,640.50
4. Step 4: Simplify right side
   74,851.50x = 9,928,229,240.25
5. Step 5: Solve for x
   x = 9,928,229,240.25/74,851.50
6. Step 6: Final answer
   x = 132,639.02