Finding the Third Proportional to 11,280 and 20,976

Step by Step Solution

1. Step 1: Write the proportion equation
   11,280 : 20,976 = 20,976 : x
2. Step 2: Convert to fraction form
   11,280/20,976 = 20,976/x
3. Step 3: Cross multiply
   11,280x = 20,976 × 20,976
4. Step 4: Simplify right side
   11,280x = 439,992,576
5. Step 5: Solve for x
   x = 439,992,576/11,280
6. Step 6: Final answer
   x = 39,006.43