Finding the Third Proportional to 8,788.50 and 10,680.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.50 : 10,680.75 = 10,680.75 : x
2. Step 2: Convert to fraction form
   8,788.50/10,680.75 = 10,680.75/x
3. Step 3: Cross multiply
   8,788.50x = 10,680.75 × 10,680.75
4. Step 4: Simplify right side
   8,788.50x = 114,078,420.56
5. Step 5: Solve for x
   x = 114,078,420.56/8,788.50
6. Step 6: Final answer
   x = 12,980.42