Finding the Third Proportional to 12,868 and 13,988

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868 : 13,988 = 13,988 : x
2. Step 2: Convert to fraction form
   12,868/13,988 = 13,988/x
3. Step 3: Cross multiply
   12,868x = 13,988 × 13,988
4. Step 4: Simplify right side
   12,868x = 195,664,144
5. Step 5: Solve for x
   x = 195,664,144/12,868
6. Step 6: Final answer
   x = 15,205.48