Finding the Third Proportional to 1,199,817 and 1,687,459

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199,817 : 1,687,459 = 1,687,459 : x
2. Step 2: Convert to fraction form
   1,199,817/1,687,459 = 1,687,459/x
3. Step 3: Cross multiply
   1,199,817x = 1,687,459 × 1,687,459
4. Step 4: Simplify right side
   1,199,817x = 2,847,517,876,681
5. Step 5: Solve for x
   x = 2,847,517,876,681/1,199,817
6. Step 6: Final answer
   x = 2,373,293.49