Finding the Third Proportional to 12,886 and 17,099

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886 : 17,099 = 17,099 : x
2. Step 2: Convert to fraction form
   12,886/17,099 = 17,099/x
3. Step 3: Cross multiply
   12,886x = 17,099 × 17,099
4. Step 4: Simplify right side
   12,886x = 292,375,801
5. Step 5: Solve for x
   x = 292,375,801/12,886
6. Step 6: Final answer
   x = 22,689.41