Finding the Fourth Proportional to 3,721.58, 5,549.53 and 3,688.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,721.58 : 5,549.53 = 3,688.28 : x
2. Step 2: Convert to fraction form
   3,721.58/5,549.53 = 3,688.28/x
3. Step 3: Cross multiply
   3,721.58x = 5,549.53 × 3,688.28
4. Step 4: Simplify right side
   3,721.58x = 20,468,183.54
5. Step 5: Solve for x
   x = 20,468,183.54/3,721.58
6. Step 6: Final answer
   x = 5,499.87