Finding the Third Proportional to 89,155.69 and 121,429.13

Step by Step Solution

1. Step 1: Write the proportion equation
   89,155.69 : 121,429.13 = 121,429.13 : x
2. Step 2: Convert to fraction form
   89,155.69/121,429.13 = 121,429.13/x
3. Step 3: Cross multiply
   89,155.69x = 121,429.13 × 121,429.13
4. Step 4: Simplify right side
   89,155.69x = 14,745,032,398.27
5. Step 5: Solve for x
   x = 14,745,032,398.27/89,155.69
6. Step 6: Final answer
   x = 165,385.21