Finding the Third Proportional to 2,112 and 5,428

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112 : 5,428 = 5,428 : x
2. Step 2: Convert to fraction form
   2,112/5,428 = 5,428/x
3. Step 3: Cross multiply
   2,112x = 5,428 × 5,428
4. Step 4: Simplify right side
   2,112x = 29,463,184
5. Step 5: Solve for x
   x = 29,463,184/2,112
6. Step 6: Final answer
   x = 13,950.37