Finding the Fourth Proportional to 13,849.38, 20,771.82 and 3,986.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,849.38 : 20,771.82 = 3,986.42 : x
2. Step 2: Convert to fraction form
   13,849.38/20,771.82 = 3,986.42/x
3. Step 3: Cross multiply
   13,849.38x = 20,771.82 × 3,986.42
4. Step 4: Simplify right side
   13,849.38x = 82,805,094.83
5. Step 5: Solve for x
   x = 82,805,094.83/13,849.38
6. Step 6: Final answer
   x = 5,978.97