Finding the Fourth Proportional to 3,867.37, 5,340.53 and 3,660.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867.37 : 5,340.53 = 3,660.21 : x
2. Step 2: Convert to fraction form
   3,867.37/5,340.53 = 3,660.21/x
3. Step 3: Cross multiply
   3,867.37x = 5,340.53 × 3,660.21
4. Step 4: Simplify right side
   3,867.37x = 19,547,443.01
5. Step 5: Solve for x
   x = 19,547,443.01/3,867.37
6. Step 6: Final answer
   x = 5,054.46