Finding the Third Proportional to 89,300.50 and 121,610

Step by Step Solution

1. Step 1: Write the proportion equation
   89,300.50 : 121,610 = 121,610 : x
2. Step 2: Convert to fraction form
   89,300.50/121,610 = 121,610/x
3. Step 3: Cross multiply
   89,300.50x = 121,610 × 121,610
4. Step 4: Simplify right side
   89,300.50x = 14,788,992,100
5. Step 5: Solve for x
   x = 14,788,992,100/89,300.50
6. Step 6: Final answer
   x = 165,609.29