Finding the Third Proportional to 67,839.75 and 99,728.16

Step by Step Solution

1. Step 1: Write the proportion equation
   67,839.75 : 99,728.16 = 99,728.16 : x
2. Step 2: Convert to fraction form
   67,839.75/99,728.16 = 99,728.16/x
3. Step 3: Cross multiply
   67,839.75x = 99,728.16 × 99,728.16
4. Step 4: Simplify right side
   67,839.75x = 9,945,705,149.02
5. Step 5: Solve for x
   x = 9,945,705,149.02/67,839.75
6. Step 6: Final answer
   x = 146,605.86