Finding the Third Proportional to 688,686 and 1,491,756

Step by Step Solution

1. Step 1: Write the proportion equation
   688,686 : 1,491,756 = 1,491,756 : x
2. Step 2: Convert to fraction form
   688,686/1,491,756 = 1,491,756/x
3. Step 3: Cross multiply
   688,686x = 1,491,756 × 1,491,756
4. Step 4: Simplify right side
   688,686x = 2,225,335,963,536
5. Step 5: Solve for x
   x = 2,225,335,963,536/688,686
6. Step 6: Final answer
   x = 3,231,278.06