Finding the Third Proportional to 8,559.25 and 12,781.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,559.25 : 12,781.25 = 12,781.25 : x
2. Step 2: Convert to fraction form
   8,559.25/12,781.25 = 12,781.25/x
3. Step 3: Cross multiply
   8,559.25x = 12,781.25 × 12,781.25
4. Step 4: Simplify right side
   8,559.25x = 163,360,351.56
5. Step 5: Solve for x
   x = 163,360,351.56/8,559.25
6. Step 6: Final answer
   x = 19,085.83