Finding the Third Proportional to 1,228,638 and 2,555,367

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228,638 : 2,555,367 = 2,555,367 : x
2. Step 2: Convert to fraction form
   1,228,638/2,555,367 = 2,555,367/x
3. Step 3: Cross multiply
   1,228,638x = 2,555,367 × 2,555,367
4. Step 4: Simplify right side
   1,228,638x = 6,529,900,504,689
5. Step 5: Solve for x
   x = 6,529,900,504,689/1,228,638
6. Step 6: Final answer
   x = 5,314,747.31