Finding the Fourth Proportional to 3,801.61, 5,711.64 and 3,591.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,801.61 : 5,711.64 = 3,591.82 : x
2. Step 2: Convert to fraction form
   3,801.61/5,711.64 = 3,591.82/x
3. Step 3: Cross multiply
   3,801.61x = 5,711.64 × 3,591.82
4. Step 4: Simplify right side
   3,801.61x = 20,515,182.78
5. Step 5: Solve for x
   x = 20,515,182.78/3,801.61
6. Step 6: Final answer
   x = 5,396.45