Finding the Fourth Proportional to 13,724.33, 20,591.42 and 5,399.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,724.33 : 20,591.42 = 5,399.73 : x
2. Step 2: Convert to fraction form
   13,724.33/20,591.42 = 5,399.73/x
3. Step 3: Cross multiply
   13,724.33x = 20,591.42 × 5,399.73
4. Step 4: Simplify right side
   13,724.33x = 111,188,081.32
5. Step 5: Solve for x
   x = 111,188,081.32/13,724.33
6. Step 6: Final answer
   x = 8,101.53