Finding the Third Proportional to 686,508 and 1,420,752

Step by Step Solution

1. Step 1: Write the proportion equation
   686,508 : 1,420,752 = 1,420,752 : x
2. Step 2: Convert to fraction form
   686,508/1,420,752 = 1,420,752/x
3. Step 3: Cross multiply
   686,508x = 1,420,752 × 1,420,752
4. Step 4: Simplify right side
   686,508x = 2,018,536,245,504
5. Step 5: Solve for x
   x = 2,018,536,245,504/686,508
6. Step 6: Final answer
   x = 2,940,295.30