Finding the Third Proportional to 89,211.75 and 121,100.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,211.75 : 121,100.25 = 121,100.25 : x
2. Step 2: Convert to fraction form
   89,211.75/121,100.25 = 121,100.25/x
3. Step 3: Cross multiply
   89,211.75x = 121,100.25 × 121,100.25
4. Step 4: Simplify right side
   89,211.75x = 14,665,270,550.06
5. Step 5: Solve for x
   x = 14,665,270,550.06/89,211.75
6. Step 6: Final answer
   x = 164,387.21