Finding the Third Proportional to 12,988 and 17,266

Step by Step Solution

1. Step 1: Write the proportion equation
   12,988 : 17,266 = 17,266 : x
2. Step 2: Convert to fraction form
   12,988/17,266 = 17,266/x
3. Step 3: Cross multiply
   12,988x = 17,266 × 17,266
4. Step 4: Simplify right side
   12,988x = 298,114,756
5. Step 5: Solve for x
   x = 298,114,756/12,988
6. Step 6: Final answer
   x = 22,953.09