Finding the Third Proportional to 1,248,840 and 2,687,256

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248,840 : 2,687,256 = 2,687,256 : x
2. Step 2: Convert to fraction form
   1,248,840/2,687,256 = 2,687,256/x
3. Step 3: Cross multiply
   1,248,840x = 2,687,256 × 2,687,256
4. Step 4: Simplify right side
   1,248,840x = 7,221,344,809,536
5. Step 5: Solve for x
   x = 7,221,344,809,536/1,248,840
6. Step 6: Final answer
   x = 5,782,441.95