Finding the Third Proportional to 404,919 and 628,605

Step by Step Solution

1. Step 1: Write the proportion equation
   404,919 : 628,605 = 628,605 : x
2. Step 2: Convert to fraction form
   404,919/628,605 = 628,605/x
3. Step 3: Cross multiply
   404,919x = 628,605 × 628,605
4. Step 4: Simplify right side
   404,919x = 395,144,246,025
5. Step 5: Solve for x
   x = 395,144,246,025/404,919
6. Step 6: Final answer
   x = 975,859.98