Finding the Third Proportional to 2,860 and 3,280

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860 : 3,280 = 3,280 : x
2. Step 2: Convert to fraction form
   2,860/3,280 = 3,280/x
3. Step 3: Cross multiply
   2,860x = 3,280 × 3,280
4. Step 4: Simplify right side
   2,860x = 10,758,400
5. Step 5: Solve for x
   x = 10,758,400/2,860
6. Step 6: Final answer
   x = 3,761.68