Finding the Third Proportional to 644,928 and 1,394,920

Step by Step Solution

1. Step 1: Write the proportion equation
   644,928 : 1,394,920 = 1,394,920 : x
2. Step 2: Convert to fraction form
   644,928/1,394,920 = 1,394,920/x
3. Step 3: Cross multiply
   644,928x = 1,394,920 × 1,394,920
4. Step 4: Simplify right side
   644,928x = 1,945,801,806,400
5. Step 5: Solve for x
   x = 1,945,801,806,400/644,928
6. Step 6: Final answer
   x = 3,017,083.78