Finding the Third Proportional to 637,123 and 1,368,689

Step by Step Solution

1. Step 1: Write the proportion equation
   637,123 : 1,368,689 = 1,368,689 : x
2. Step 2: Convert to fraction form
   637,123/1,368,689 = 1,368,689/x
3. Step 3: Cross multiply
   637,123x = 1,368,689 × 1,368,689
4. Step 4: Simplify right side
   637,123x = 1,873,309,578,721
5. Step 5: Solve for x
   x = 1,873,309,578,721/637,123
6. Step 6: Final answer
   x = 2,940,263.62