Finding the Third Proportional to 218,162.25 and 320,061.38

Step by Step Solution

1. Step 1: Write the proportion equation
   218,162.25 : 320,061.38 = 320,061.38 : x
2. Step 2: Convert to fraction form
   218,162.25/320,061.38 = 320,061.38/x
3. Step 3: Cross multiply
   218,162.25x = 320,061.38 × 320,061.38
4. Step 4: Simplify right side
   218,162.25x = 102,439,283,766.89
5. Step 5: Solve for x
   x = 102,439,283,766.89/218,162.25
6. Step 6: Final answer
   x = 469,555.50