Finding the Fourth Proportional to 3,983.69, 5,477.82 and 3,540.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.69 : 5,477.82 = 3,540.80 : x
2. Step 2: Convert to fraction form
   3,983.69/5,477.82 = 3,540.80/x
3. Step 3: Cross multiply
   3,983.69x = 5,477.82 × 3,540.80
4. Step 4: Simplify right side
   3,983.69x = 19,395,865.06
5. Step 5: Solve for x
   x = 19,395,865.06/3,983.69
6. Step 6: Final answer
   x = 4,868.82