Finding the Third Proportional to 8,782.69 and 12,845.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,782.69 : 12,845.25 = 12,845.25 : x
2. Step 2: Convert to fraction form
   8,782.69/12,845.25 = 12,845.25/x
3. Step 3: Cross multiply
   8,782.69x = 12,845.25 × 12,845.25
4. Step 4: Simplify right side
   8,782.69x = 165,000,447.56
5. Step 5: Solve for x
   x = 165,000,447.56/8,782.69
6. Step 6: Final answer
   x = 18,787.01