Finding the Third Proportional to 681,668 and 1,036,665

Step by Step Solution

1. Step 1: Write the proportion equation
   681,668 : 1,036,665 = 1,036,665 : x
2. Step 2: Convert to fraction form
   681,668/1,036,665 = 1,036,665/x
3. Step 3: Cross multiply
   681,668x = 1,036,665 × 1,036,665
4. Step 4: Simplify right side
   681,668x = 1,074,674,322,225
5. Step 5: Solve for x
   x = 1,074,674,322,225/681,668
6. Step 6: Final answer
   x = 1,576,536.26