Finding the Third Proportional to 2,808 and 7,200

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808 : 7,200 = 7,200 : x
2. Step 2: Convert to fraction form
   2,808/7,200 = 7,200/x
3. Step 3: Cross multiply
   2,808x = 7,200 × 7,200
4. Step 4: Simplify right side
   2,808x = 51,840,000
5. Step 5: Solve for x
   x = 51,840,000/2,808
6. Step 6: Final answer
   x = 18,461.54