Finding the Third Proportional to 2,686 and 3,948

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686 : 3,948 = 3,948 : x
2. Step 2: Convert to fraction form
   2,686/3,948 = 3,948/x
3. Step 3: Cross multiply
   2,686x = 3,948 × 3,948
4. Step 4: Simplify right side
   2,686x = 15,586,704
5. Step 5: Solve for x
   x = 15,586,704/2,686
6. Step 6: Final answer
   x = 5,802.94