Finding the Third Proportional to 89,605.50 and 121,764

Step by Step Solution

1. Step 1: Write the proportion equation
   89,605.50 : 121,764 = 121,764 : x
2. Step 2: Convert to fraction form
   89,605.50/121,764 = 121,764/x
3. Step 3: Cross multiply
   89,605.50x = 121,764 × 121,764
4. Step 4: Simplify right side
   89,605.50x = 14,826,471,696
5. Step 5: Solve for x
   x = 14,826,471,696/89,605.50
6. Step 6: Final answer
   x = 165,463.86