Finding the Third Proportional to 644,464 and 1,399,648

Step by Step Solution

1. Step 1: Write the proportion equation
   644,464 : 1,399,648 = 1,399,648 : x
2. Step 2: Convert to fraction form
   644,464/1,399,648 = 1,399,648/x
3. Step 3: Cross multiply
   644,464x = 1,399,648 × 1,399,648
4. Step 4: Simplify right side
   644,464x = 1,959,014,523,904
5. Step 5: Solve for x
   x = 1,959,014,523,904/644,464
6. Step 6: Final answer
   x = 3,039,757.88