Finding the Third Proportional to 89,211 and 121,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,211 : 121,510.50 = 121,510.50 : x
2. Step 2: Convert to fraction form
   89,211/121,510.50 = 121,510.50/x
3. Step 3: Cross multiply
   89,211x = 121,510.50 × 121,510.50
4. Step 4: Simplify right side
   89,211x = 14,764,801,610.25
5. Step 5: Solve for x
   x = 14,764,801,610.25/89,211
6. Step 6: Final answer
   x = 165,504.27