Finding the Third Proportional to 12,872 and 13,992

Step by Step Solution

1. Step 1: Write the proportion equation
   12,872 : 13,992 = 13,992 : x
2. Step 2: Convert to fraction form
   12,872/13,992 = 13,992/x
3. Step 3: Cross multiply
   12,872x = 13,992 × 13,992
4. Step 4: Simplify right side
   12,872x = 195,776,064
5. Step 5: Solve for x
   x = 195,776,064/12,872
6. Step 6: Final answer
   x = 15,209.45