Finding the Third Proportional to 8,661.38 and 12,703.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,661.38 : 12,703.50 = 12,703.50 : x
2. Step 2: Convert to fraction form
   8,661.38/12,703.50 = 12,703.50/x
3. Step 3: Cross multiply
   8,661.38x = 12,703.50 × 12,703.50
4. Step 4: Simplify right side
   8,661.38x = 161,378,912.25
5. Step 5: Solve for x
   x = 161,378,912.25/8,661.38
6. Step 6: Final answer
   x = 18,632.02