Finding the Third Proportional to 2,658,478 and 3,986,742

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658,478 : 3,986,742 = 3,986,742 : x
2. Step 2: Convert to fraction form
   2,658,478/3,986,742 = 3,986,742/x
3. Step 3: Cross multiply
   2,658,478x = 3,986,742 × 3,986,742
4. Step 4: Simplify right side
   2,658,478x = 15,894,111,774,564
5. Step 5: Solve for x
   x = 15,894,111,774,564/2,658,478
6. Step 6: Final answer
   x = 5,978,650.86