Finding the Third Proportional to 621,806 and 1,338,742

Step by Step Solution

1. Step 1: Write the proportion equation
   621,806 : 1,338,742 = 1,338,742 : x
2. Step 2: Convert to fraction form
   621,806/1,338,742 = 1,338,742/x
3. Step 3: Cross multiply
   621,806x = 1,338,742 × 1,338,742
4. Step 4: Simplify right side
   621,806x = 1,792,230,142,564
5. Step 5: Solve for x
   x = 1,792,230,142,564/621,806
6. Step 6: Final answer
   x = 2,882,297.92