Finding the Third Proportional to 778,626 and 1,689,444

Step by Step Solution

1. Step 1: Write the proportion equation
   778,626 : 1,689,444 = 1,689,444 : x
2. Step 2: Convert to fraction form
   778,626/1,689,444 = 1,689,444/x
3. Step 3: Cross multiply
   778,626x = 1,689,444 × 1,689,444
4. Step 4: Simplify right side
   778,626x = 2,854,221,029,136
5. Step 5: Solve for x
   x = 2,854,221,029,136/778,626
6. Step 6: Final answer
   x = 3,665,715.03