Finding the Third Proportional to 443,469 and 664,519

Step by Step Solution

1. Step 1: Write the proportion equation
   443,469 : 664,519 = 664,519 : x
2. Step 2: Convert to fraction form
   443,469/664,519 = 664,519/x
3. Step 3: Cross multiply
   443,469x = 664,519 × 664,519
4. Step 4: Simplify right side
   443,469x = 441,585,501,361
5. Step 5: Solve for x
   x = 441,585,501,361/443,469
6. Step 6: Final answer
   x = 995,752.81