Finding the Third Proportional to 12,724 and 13,876

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724 : 13,876 = 13,876 : x
2. Step 2: Convert to fraction form
   12,724/13,876 = 13,876/x
3. Step 3: Cross multiply
   12,724x = 13,876 × 13,876
4. Step 4: Simplify right side
   12,724x = 192,543,376
5. Step 5: Solve for x
   x = 192,543,376/12,724
6. Step 6: Final answer
   x = 15,132.30