Finding the Third Proportional to 2,912 and 4,128

Step by Step Solution

1. Step 1: Write the proportion equation
   2,912 : 4,128 = 4,128 : x
2. Step 2: Convert to fraction form
   2,912/4,128 = 4,128/x
3. Step 3: Cross multiply
   2,912x = 4,128 × 4,128
4. Step 4: Simplify right side
   2,912x = 17,040,384
5. Step 5: Solve for x
   x = 17,040,384/2,912
6. Step 6: Final answer
   x = 5,851.78