Finding the Third Proportional to 11,399 and 17,131

Step by Step Solution

1. Step 1: Write the proportion equation
   11,399 : 17,131 = 17,131 : x
2. Step 2: Convert to fraction form
   11,399/17,131 = 17,131/x
3. Step 3: Cross multiply
   11,399x = 17,131 × 17,131
4. Step 4: Simplify right side
   11,399x = 293,471,161
5. Step 5: Solve for x
   x = 293,471,161/11,399
6. Step 6: Final answer
   x = 25,745.34