Finding the Third Proportional to 10,960 and 12,880

Step by Step Solution

1. Step 1: Write the proportion equation
   10,960 : 12,880 = 12,880 : x
2. Step 2: Convert to fraction form
   10,960/12,880 = 12,880/x
3. Step 3: Cross multiply
   10,960x = 12,880 × 12,880
4. Step 4: Simplify right side
   10,960x = 165,894,400
5. Step 5: Solve for x
   x = 165,894,400/10,960
6. Step 6: Final answer
   x = 15,136.35