Finding the Third Proportional to 12,162.56 and 15,540.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,162.56 : 15,540.94 = 15,540.94 : x
2. Step 2: Convert to fraction form
   12,162.56/15,540.94 = 15,540.94/x
3. Step 3: Cross multiply
   12,162.56x = 15,540.94 × 15,540.94
4. Step 4: Simplify right side
   12,162.56x = 241,520,738.38
5. Step 5: Solve for x
   x = 241,520,738.38/12,162.56
6. Step 6: Final answer
   x = 19,857.72