Finding the Third Proportional to 404,610 and 628,648

Step by Step Solution

1. Step 1: Write the proportion equation
   404,610 : 628,648 = 628,648 : x
2. Step 2: Convert to fraction form
   404,610/628,648 = 628,648/x
3. Step 3: Cross multiply
   404,610x = 628,648 × 628,648
4. Step 4: Simplify right side
   404,610x = 395,198,307,904
5. Step 5: Solve for x
   x = 395,198,307,904/404,610
6. Step 6: Final answer
   x = 976,738.85