Finding the Third Proportional to 778,206 and 1,428,540

Step by Step Solution

1. Step 1: Write the proportion equation
   778,206 : 1,428,540 = 1,428,540 : x
2. Step 2: Convert to fraction form
   778,206/1,428,540 = 1,428,540/x
3. Step 3: Cross multiply
   778,206x = 1,428,540 × 1,428,540
4. Step 4: Simplify right side
   778,206x = 2,040,726,531,600
5. Step 5: Solve for x
   x = 2,040,726,531,600/778,206
6. Step 6: Final answer
   x = 2,622,347.47