Finding the Third Proportional to 2,700 and 5,400

Step by Step Solution

1. Step 1: Write the proportion equation
   2,700 : 5,400 = 5,400 : x
2. Step 2: Convert to fraction form
   2,700/5,400 = 5,400/x
3. Step 3: Cross multiply
   2,700x = 5,400 × 5,400
4. Step 4: Simplify right side
   2,700x = 29,160,000
5. Step 5: Solve for x
   x = 29,160,000/2,700
6. Step 6: Final answer
   x = 10,800