Finding the Third Proportional to 5,728 and 10,128

Step by Step Solution

1. Step 1: Write the proportion equation
   5,728 : 10,128 = 10,128 : x
2. Step 2: Convert to fraction form
   5,728/10,128 = 10,128/x
3. Step 3: Cross multiply
   5,728x = 10,128 × 10,128
4. Step 4: Simplify right side
   5,728x = 102,576,384
5. Step 5: Solve for x
   x = 102,576,384/5,728
6. Step 6: Final answer
   x = 17,907.89