Finding the Third Proportional to 1,128,638 and 2,412,580

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,638 : 2,412,580 = 2,412,580 : x
2. Step 2: Convert to fraction form
   1,128,638/2,412,580 = 2,412,580/x
3. Step 3: Cross multiply
   1,128,638x = 2,412,580 × 2,412,580
4. Step 4: Simplify right side
   1,128,638x = 5,820,542,256,400
5. Step 5: Solve for x
   x = 5,820,542,256,400/1,128,638
6. Step 6: Final answer
   x = 5,157,138.30