Finding the Third Proportional to 1,291,616 and 2,815,744

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,616 : 2,815,744 = 2,815,744 : x
2. Step 2: Convert to fraction form
   1,291,616/2,815,744 = 2,815,744/x
3. Step 3: Cross multiply
   1,291,616x = 2,815,744 × 2,815,744
4. Step 4: Simplify right side
   1,291,616x = 7,928,414,273,536
5. Step 5: Solve for x
   x = 7,928,414,273,536/1,291,616
6. Step 6: Final answer
   x = 6,138,367.96