Finding the Third Proportional to 644,404 and 1,399,568

Step by Step Solution

1. Step 1: Write the proportion equation
   644,404 : 1,399,568 = 1,399,568 : x
2. Step 2: Convert to fraction form
   644,404/1,399,568 = 1,399,568/x
3. Step 3: Cross multiply
   644,404x = 1,399,568 × 1,399,568
4. Step 4: Simplify right side
   644,404x = 1,958,790,586,624
5. Step 5: Solve for x
   x = 1,958,790,586,624/644,404
6. Step 6: Final answer
   x = 3,039,693.40