Finding the Third Proportional to 3,860 and 5,078

Step by Step Solution

1. Step 1: Write the proportion equation
   3,860 : 5,078 = 5,078 : x
2. Step 2: Convert to fraction form
   3,860/5,078 = 5,078/x
3. Step 3: Cross multiply
   3,860x = 5,078 × 5,078
4. Step 4: Simplify right side
   3,860x = 25,786,084
5. Step 5: Solve for x
   x = 25,786,084/3,860
6. Step 6: Final answer
   x = 6,680.33