Finding the Third Proportional to 688,434 and 1,491,240

Step by Step Solution

1. Step 1: Write the proportion equation
   688,434 : 1,491,240 = 1,491,240 : x
2. Step 2: Convert to fraction form
   688,434/1,491,240 = 1,491,240/x
3. Step 3: Cross multiply
   688,434x = 1,491,240 × 1,491,240
4. Step 4: Simplify right side
   688,434x = 2,223,796,737,600
5. Step 5: Solve for x
   x = 2,223,796,737,600/688,434
6. Step 6: Final answer
   x = 3,230,225.03