Finding the Third Proportional to 8,205 and 12,013.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,205 : 12,013.50 = 12,013.50 : x
2. Step 2: Convert to fraction form
   8,205/12,013.50 = 12,013.50/x
3. Step 3: Cross multiply
   8,205x = 12,013.50 × 12,013.50
4. Step 4: Simplify right side
   8,205x = 144,324,182.25
5. Step 5: Solve for x
   x = 144,324,182.25/8,205
6. Step 6: Final answer
   x = 17,589.78