Finding the Third Proportional to 686,820 and 1,491,804

Step by Step Solution

1. Step 1: Write the proportion equation
   686,820 : 1,491,804 = 1,491,804 : x
2. Step 2: Convert to fraction form
   686,820/1,491,804 = 1,491,804/x
3. Step 3: Cross multiply
   686,820x = 1,491,804 × 1,491,804
4. Step 4: Simplify right side
   686,820x = 2,225,479,174,416
5. Step 5: Solve for x
   x = 2,225,479,174,416/686,820
6. Step 6: Final answer
   x = 3,240,265.53