Finding the Third Proportional to 2,171,486 and 4,288,474

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171,486 : 4,288,474 = 4,288,474 : x
2. Step 2: Convert to fraction form
   2,171,486/4,288,474 = 4,288,474/x
3. Step 3: Cross multiply
   2,171,486x = 4,288,474 × 4,288,474
4. Step 4: Simplify right side
   2,171,486x = 18,391,009,248,676
5. Step 5: Solve for x
   x = 18,391,009,248,676/2,171,486
6. Step 6: Final answer
   x = 8,469,319.74