Finding the Third Proportional to 2,840 and 3,974

Step by Step Solution

1. Step 1: Write the proportion equation
   2,840 : 3,974 = 3,974 : x
2. Step 2: Convert to fraction form
   2,840/3,974 = 3,974/x
3. Step 3: Cross multiply
   2,840x = 3,974 × 3,974
4. Step 4: Simplify right side
   2,840x = 15,792,676
5. Step 5: Solve for x
   x = 15,792,676/2,840
6. Step 6: Final answer
   x = 5,560.80