Finding the Third Proportional to 80,899 and 126,629.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,899 : 126,629.50 = 126,629.50 : x
2. Step 2: Convert to fraction form
   80,899/126,629.50 = 126,629.50/x
3. Step 3: Cross multiply
   80,899x = 126,629.50 × 126,629.50
4. Step 4: Simplify right side
   80,899x = 16,035,030,270.25
5. Step 5: Solve for x
   x = 16,035,030,270.25/80,899
6. Step 6: Final answer
   x = 198,210.49