Finding the Third Proportional to 2,489,376 and 3,992,616

Step by Step Solution

1. Step 1: Write the proportion equation
   2,489,376 : 3,992,616 = 3,992,616 : x
2. Step 2: Convert to fraction form
   2,489,376/3,992,616 = 3,992,616/x
3. Step 3: Cross multiply
   2,489,376x = 3,992,616 × 3,992,616
4. Step 4: Simplify right side
   2,489,376x = 15,940,982,523,456
5. Step 5: Solve for x
   x = 15,940,982,523,456/2,489,376
6. Step 6: Final answer
   x = 6,403,605.77