Finding the Third Proportional to 686,662 and 1,491,540

Step by Step Solution

1. Step 1: Write the proportion equation
   686,662 : 1,491,540 = 1,491,540 : x
2. Step 2: Convert to fraction form
   686,662/1,491,540 = 1,491,540/x
3. Step 3: Cross multiply
   686,662x = 1,491,540 × 1,491,540
4. Step 4: Simplify right side
   686,662x = 2,224,691,571,600
5. Step 5: Solve for x
   x = 2,224,691,571,600/686,662
6. Step 6: Final answer
   x = 3,239,864.11