Finding the Third Proportional to 89,494 and 121,109

Step by Step Solution

1. Step 1: Write the proportion equation
   89,494 : 121,109 = 121,109 : x
2. Step 2: Convert to fraction form
   89,494/121,109 = 121,109/x
3. Step 3: Cross multiply
   89,494x = 121,109 × 121,109
4. Step 4: Simplify right side
   89,494x = 14,667,389,881
5. Step 5: Solve for x
   x = 14,667,389,881/89,494
6. Step 6: Final answer
   x = 163,892.44