Finding the Third Proportional to 89,215 and 121,104.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,215 : 121,104.50 = 121,104.50 : x
2. Step 2: Convert to fraction form
   89,215/121,104.50 = 121,104.50/x
3. Step 3: Cross multiply
   89,215x = 121,104.50 × 121,104.50
4. Step 4: Simplify right side
   89,215x = 14,666,299,920.25
5. Step 5: Solve for x
   x = 14,666,299,920.25/89,215
6. Step 6: Final answer
   x = 164,392.76