Finding the Third Proportional to 10,880 and 12,800

Step by Step Solution

1. Step 1: Write the proportion equation
   10,880 : 12,800 = 12,800 : x
2. Step 2: Convert to fraction form
   10,880/12,800 = 12,800/x
3. Step 3: Cross multiply
   10,880x = 12,800 × 12,800
4. Step 4: Simplify right side
   10,880x = 163,840,000
5. Step 5: Solve for x
   x = 163,840,000/10,880
6. Step 6: Final answer
   x = 15,058.82