Finding the Third Proportional to 10,717.25 and 16,689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,717.25 : 16,689.50 = 16,689.50 : x
2. Step 2: Convert to fraction form
   10,717.25/16,689.50 = 16,689.50/x
3. Step 3: Cross multiply
   10,717.25x = 16,689.50 × 16,689.50
4. Step 4: Simplify right side
   10,717.25x = 278,539,410.25
5. Step 5: Solve for x
   x = 278,539,410.25/10,717.25
6. Step 6: Final answer
   x = 25,989.82