Finding the Third Proportional to 1,292,588 and 2,647,864

Step by Step Solution

1. Step 1: Write the proportion equation
   1,292,588 : 2,647,864 = 2,647,864 : x
2. Step 2: Convert to fraction form
   1,292,588/2,647,864 = 2,647,864/x
3. Step 3: Cross multiply
   1,292,588x = 2,647,864 × 2,647,864
4. Step 4: Simplify right side
   1,292,588x = 7,011,183,762,496
5. Step 5: Solve for x
   x = 7,011,183,762,496/1,292,588
6. Step 6: Final answer
   x = 5,424,144.25