Finding the Fourth Proportional to 13,726.94, 20,571.93 and 5,404.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,726.94 : 20,571.93 = 5,404.71 : x
2. Step 2: Convert to fraction form
   13,726.94/20,571.93 = 5,404.71/x
3. Step 3: Cross multiply
   13,726.94x = 20,571.93 × 5,404.71
4. Step 4: Simplify right side
   13,726.94x = 111,185,315.79
5. Step 5: Solve for x
   x = 111,185,315.79/13,726.94
6. Step 6: Final answer
   x = 8,099.79