Finding the Fourth Proportional to 13,601.49, 20,399.89 and 3,606.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,601.49 : 20,399.89 = 3,606.30 : x
2. Step 2: Convert to fraction form
   13,601.49/20,399.89 = 3,606.30/x
3. Step 3: Cross multiply
   13,601.49x = 20,399.89 × 3,606.30
4. Step 4: Simplify right side
   13,601.49x = 73,568,123.31
5. Step 5: Solve for x
   x = 73,568,123.31/13,601.49
6. Step 6: Final answer
   x = 5,408.83