Finding the Fourth Proportional to 3,813.72, 5,704.76 and 3,580.44

Step by Step Solution

1. Step 1: Write the proportion equation
   3,813.72 : 5,704.76 = 3,580.44 : x
2. Step 2: Convert to fraction form
   3,813.72/5,704.76 = 3,580.44/x
3. Step 3: Cross multiply
   3,813.72x = 5,704.76 × 3,580.44
4. Step 4: Simplify right side
   3,813.72x = 20,425,550.89
5. Step 5: Solve for x
   x = 20,425,550.89/3,813.72
6. Step 6: Final answer
   x = 5,355.81