Finding the Third Proportional to 688,426 and 1,491,260

Step by Step Solution

1. Step 1: Write the proportion equation
   688,426 : 1,491,260 = 1,491,260 : x
2. Step 2: Convert to fraction form
   688,426/1,491,260 = 1,491,260/x
3. Step 3: Cross multiply
   688,426x = 1,491,260 × 1,491,260
4. Step 4: Simplify right side
   688,426x = 2,223,856,387,600
5. Step 5: Solve for x
   x = 2,223,856,387,600/688,426
6. Step 6: Final answer
   x = 3,230,349.21