Finding the Fourth Proportional to 27,471.72, 41,174.78 and 12,665.72

Step by Step Solution

1. Step 1: Write the proportion equation
   27,471.72 : 41,174.78 = 12,665.72 : x
2. Step 2: Convert to fraction form
   27,471.72/41,174.78 = 12,665.72/x
3. Step 3: Cross multiply
   27,471.72x = 41,174.78 × 12,665.72
4. Step 4: Simplify right side
   27,471.72x = 521,508,234.54
5. Step 5: Solve for x
   x = 521,508,234.54/27,471.72
6. Step 6: Final answer
   x = 18,983.46