Finding the Third Proportional to 681,686 and 1,036,694

Step by Step Solution

1. Step 1: Write the proportion equation
   681,686 : 1,036,694 = 1,036,694 : x
2. Step 2: Convert to fraction form
   681,686/1,036,694 = 1,036,694/x
3. Step 3: Cross multiply
   681,686x = 1,036,694 × 1,036,694
4. Step 4: Simplify right side
   681,686x = 1,074,734,449,636
5. Step 5: Solve for x
   x = 1,074,734,449,636/681,686
6. Step 6: Final answer
   x = 1,576,582.84