Finding the Fourth Proportional to 3,930.92, 5,865.72 and 3,581.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.92 : 5,865.72 = 3,581.60 : x
2. Step 2: Convert to fraction form
   3,930.92/5,865.72 = 3,581.60/x
3. Step 3: Cross multiply
   3,930.92x = 5,865.72 × 3,581.60
4. Step 4: Simplify right side
   3,930.92x = 21,008,633.42
5. Step 5: Solve for x
   x = 21,008,633.42/3,930.92
6. Step 6: Final answer
   x = 5,344.46