Finding the Fourth Proportional to 11,831.31, 17,717.76 and 9,176.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,831.31 : 17,717.76 = 9,176.72 : x
2. Step 2: Convert to fraction form
   11,831.31/17,717.76 = 9,176.72/x
3. Step 3: Cross multiply
   11,831.31x = 17,717.76 × 9,176.72
4. Step 4: Simplify right side
   11,831.31x = 162,590,833.96
5. Step 5: Solve for x
   x = 162,590,833.96/11,831.31
6. Step 6: Final answer
   x = 13,742.42