Finding the Third Proportional to 2,864 and 3,940

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864 : 3,940 = 3,940 : x
2. Step 2: Convert to fraction form
   2,864/3,940 = 3,940/x
3. Step 3: Cross multiply
   2,864x = 3,940 × 3,940
4. Step 4: Simplify right side
   2,864x = 15,523,600
5. Step 5: Solve for x
   x = 15,523,600/2,864
6. Step 6: Final answer
   x = 5,420.25