Finding the Third Proportional to 8,788.50 and 10,660.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.50 : 10,660.50 = 10,660.50 : x
2. Step 2: Convert to fraction form
   8,788.50/10,660.50 = 10,660.50/x
3. Step 3: Cross multiply
   8,788.50x = 10,660.50 × 10,660.50
4. Step 4: Simplify right side
   8,788.50x = 113,646,260.25
5. Step 5: Solve for x
   x = 113,646,260.25/8,788.50
6. Step 6: Final answer
   x = 12,931.25