Finding the Third Proportional to 8,456.25 and 12,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.25 : 12,685.50 = 12,685.50 : x
2. Step 2: Convert to fraction form
   8,456.25/12,685.50 = 12,685.50/x
3. Step 3: Cross multiply
   8,456.25x = 12,685.50 × 12,685.50
4. Step 4: Simplify right side
   8,456.25x = 160,921,910.25
5. Step 5: Solve for x
   x = 160,921,910.25/8,456.25
6. Step 6: Final answer
   x = 19,029.94