Finding the Third Proportional to 648,438 and 1,396,752

Step by Step Solution

1. Step 1: Write the proportion equation
   648,438 : 1,396,752 = 1,396,752 : x
2. Step 2: Convert to fraction form
   648,438/1,396,752 = 1,396,752/x
3. Step 3: Cross multiply
   648,438x = 1,396,752 × 1,396,752
4. Step 4: Simplify right side
   648,438x = 1,950,916,149,504
5. Step 5: Solve for x
   x = 1,950,916,149,504/648,438
6. Step 6: Final answer
   x = 3,008,639.45