Finding the Fourth Proportional to 13,401.11, 20,103.24 and 3,540.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.11 : 20,103.24 = 3,540.47 : x
2. Step 2: Convert to fraction form
   13,401.11/20,103.24 = 3,540.47/x
3. Step 3: Cross multiply
   13,401.11x = 20,103.24 × 3,540.47
4. Step 4: Simplify right side
   13,401.11x = 71,174,817.61
5. Step 5: Solve for x
   x = 71,174,817.61/13,401.11
6. Step 6: Final answer
   x = 5,311.12