Finding the Third Proportional to 648,417 and 1,396,707

Step by Step Solution

1. Step 1: Write the proportion equation
   648,417 : 1,396,707 = 1,396,707 : x
2. Step 2: Convert to fraction form
   648,417/1,396,707 = 1,396,707/x
3. Step 3: Cross multiply
   648,417x = 1,396,707 × 1,396,707
4. Step 4: Simplify right side
   648,417x = 1,950,790,443,849
5. Step 5: Solve for x
   x = 1,950,790,443,849/648,417
6. Step 6: Final answer
   x = 3,008,543.03