Finding the Fourth Proportional to 3,789.72, 5,688 and 2,405.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.72 : 5,688 = 2,405.57 : x
2. Step 2: Convert to fraction form
   3,789.72/5,688 = 2,405.57/x
3. Step 3: Cross multiply
   3,789.72x = 5,688 × 2,405.57
4. Step 4: Simplify right side
   3,789.72x = 13,682,853.72
5. Step 5: Solve for x
   x = 13,682,853.72/3,789.72
6. Step 6: Final answer
   x = 3,610.52