Finding the Third Proportional to 644,392 and 1,394,980

Step by Step Solution

1. Step 1: Write the proportion equation
   644,392 : 1,394,980 = 1,394,980 : x
2. Step 2: Convert to fraction form
   644,392/1,394,980 = 1,394,980/x
3. Step 3: Cross multiply
   644,392x = 1,394,980 × 1,394,980
4. Step 4: Simplify right side
   644,392x = 1,945,969,200,400
5. Step 5: Solve for x
   x = 1,945,969,200,400/644,392
6. Step 6: Final answer
   x = 3,019,853.13