Finding the Third Proportional to 2,920 and 3,872

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920 : 3,872 = 3,872 : x
2. Step 2: Convert to fraction form
   2,920/3,872 = 3,872/x
3. Step 3: Cross multiply
   2,920x = 3,872 × 3,872
4. Step 4: Simplify right side
   2,920x = 14,992,384
5. Step 5: Solve for x
   x = 14,992,384/2,920
6. Step 6: Final answer
   x = 5,134.38