Finding the Third Proportional to 8,836.50 and 10,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,836.50 : 10,720.50 = 10,720.50 : x
2. Step 2: Convert to fraction form
   8,836.50/10,720.50 = 10,720.50/x
3. Step 3: Cross multiply
   8,836.50x = 10,720.50 × 10,720.50
4. Step 4: Simplify right side
   8,836.50x = 114,929,120.25
5. Step 5: Solve for x
   x = 114,929,120.25/8,836.50
6. Step 6: Final answer
   x = 13,006.18