Finding the Third Proportional to 215,053.50 and 331,605

Step by Step Solution

1. Step 1: Write the proportion equation
   215,053.50 : 331,605 = 331,605 : x
2. Step 2: Convert to fraction form
   215,053.50/331,605 = 331,605/x
3. Step 3: Cross multiply
   215,053.50x = 331,605 × 331,605
4. Step 4: Simplify right side
   215,053.50x = 109,961,876,025
5. Step 5: Solve for x
   x = 109,961,876,025/215,053.50
6. Step 6: Final answer
   x = 511,323.35