Finding the Fourth Proportional to 11,726.40, 17,591.88 and 3,831.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,726.40 : 17,591.88 = 3,831.12 : x
2. Step 2: Convert to fraction form
   11,726.40/17,591.88 = 3,831.12/x
3. Step 3: Cross multiply
   11,726.40x = 17,591.88 × 3,831.12
4. Step 4: Simplify right side
   11,726.40x = 67,396,603.31
5. Step 5: Solve for x
   x = 67,396,603.31/11,726.40
6. Step 6: Final answer
   x = 5,747.42