Finding the Third Proportional to 1,378,626 and 1,985,643

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378,626 : 1,985,643 = 1,985,643 : x
2. Step 2: Convert to fraction form
   1,378,626/1,985,643 = 1,985,643/x
3. Step 3: Cross multiply
   1,378,626x = 1,985,643 × 1,985,643
4. Step 4: Simplify right side
   1,378,626x = 3,942,778,123,449
5. Step 5: Solve for x
   x = 3,942,778,123,449/1,378,626
6. Step 6: Final answer
   x = 2,859,933.10