Finding the Fourth Proportional to 3,581.23, 5,367.39 and 2,485.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,581.23 : 5,367.39 = 2,485.30 : x
2. Step 2: Convert to fraction form
   3,581.23/5,367.39 = 2,485.30/x
3. Step 3: Cross multiply
   3,581.23x = 5,367.39 × 2,485.30
4. Step 4: Simplify right side
   3,581.23x = 13,339,574.37
5. Step 5: Solve for x
   x = 13,339,574.37/3,581.23
6. Step 6: Final answer
   x = 3,724.86