Finding the Third Proportional to 89,304.50 and 121,617.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,304.50 : 121,617.50 = 121,617.50 : x
2. Step 2: Convert to fraction form
   89,304.50/121,617.50 = 121,617.50/x
3. Step 3: Cross multiply
   89,304.50x = 121,617.50 × 121,617.50
4. Step 4: Simplify right side
   89,304.50x = 14,790,816,306.25
5. Step 5: Solve for x
   x = 14,790,816,306.25/89,304.50
6. Step 6: Final answer
   x = 165,622.30