Finding the Third Proportional to 621,799 and 1,338,730

Step by Step Solution

1. Step 1: Write the proportion equation
   621,799 : 1,338,730 = 1,338,730 : x
2. Step 2: Convert to fraction form
   621,799/1,338,730 = 1,338,730/x
3. Step 3: Cross multiply
   621,799x = 1,338,730 × 1,338,730
4. Step 4: Simplify right side
   621,799x = 1,792,198,012,900
5. Step 5: Solve for x
   x = 1,792,198,012,900/621,799
6. Step 6: Final answer
   x = 2,882,278.70