Finding the Third Proportional to 12,951 and 16,428

Step by Step Solution

1. Step 1: Write the proportion equation
   12,951 : 16,428 = 16,428 : x
2. Step 2: Convert to fraction form
   12,951/16,428 = 16,428/x
3. Step 3: Cross multiply
   12,951x = 16,428 × 16,428
4. Step 4: Simplify right side
   12,951x = 269,879,184
5. Step 5: Solve for x
   x = 269,879,184/12,951
6. Step 6: Final answer
   x = 20,838.48