Finding the Fourth Proportional to 13,801.86, 20,711.27 and 5,480.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,801.86 : 20,711.27 = 5,480.42 : x
2. Step 2: Convert to fraction form
   13,801.86/20,711.27 = 5,480.42/x
3. Step 3: Cross multiply
   13,801.86x = 20,711.27 × 5,480.42
4. Step 4: Simplify right side
   13,801.86x = 113,506,458.33
5. Step 5: Solve for x
   x = 113,506,458.33/13,801.86
6. Step 6: Final answer
   x = 8,224.00