Finding the Third Proportional to 10,617.75 and 17,691.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,617.75 : 17,691.75 = 17,691.75 : x
2. Step 2: Convert to fraction form
   10,617.75/17,691.75 = 17,691.75/x
3. Step 3: Cross multiply
   10,617.75x = 17,691.75 × 17,691.75
4. Step 4: Simplify right side
   10,617.75x = 312,998,018.06
5. Step 5: Solve for x
   x = 312,998,018.06/10,617.75
6. Step 6: Final answer
   x = 29,478.75