Finding the Third Proportional to 11,715.75 and 17,691.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,715.75 : 17,691.75 = 17,691.75 : x
2. Step 2: Convert to fraction form
   11,715.75/17,691.75 = 17,691.75/x
3. Step 3: Cross multiply
   11,715.75x = 17,691.75 × 17,691.75
4. Step 4: Simplify right side
   11,715.75x = 312,998,018.06
5. Step 5: Solve for x
   x = 312,998,018.06/11,715.75
6. Step 6: Final answer
   x = 26,716.00