Finding the Third Proportional to 2,680 and 3,906

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680 : 3,906 = 3,906 : x
2. Step 2: Convert to fraction form
   2,680/3,906 = 3,906/x
3. Step 3: Cross multiply
   2,680x = 3,906 × 3,906
4. Step 4: Simplify right side
   2,680x = 15,256,836
5. Step 5: Solve for x
   x = 15,256,836/2,680
6. Step 6: Final answer
   x = 5,692.85