Finding the Third Proportional to 121,662 and 162,740.81

Step by Step Solution

1. Step 1: Write the proportion equation
   121,662 : 162,740.81 = 162,740.81 : x
2. Step 2: Convert to fraction form
   121,662/162,740.81 = 162,740.81/x
3. Step 3: Cross multiply
   121,662x = 162,740.81 × 162,740.81
4. Step 4: Simplify right side
   121,662x = 26,484,572,053.16
5. Step 5: Solve for x
   x = 26,484,572,053.16/121,662
6. Step 6: Final answer
   x = 217,689.76