Finding the Third Proportional to 8,712.38 and 13,149.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,712.38 : 13,149.56 = 13,149.56 : x
2. Step 2: Convert to fraction form
   8,712.38/13,149.56 = 13,149.56/x
3. Step 3: Cross multiply
   8,712.38x = 13,149.56 × 13,149.56
4. Step 4: Simplify right side
   8,712.38x = 172,910,993.94
5. Step 5: Solve for x
   x = 172,910,993.94/8,712.38
6. Step 6: Final answer
   x = 19,846.60