Finding the Fourth Proportional to 3,939.54, 5,878.58 and 3,590.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.54 : 5,878.58 = 3,590.22 : x
2. Step 2: Convert to fraction form
   3,939.54/5,878.58 = 3,590.22/x
3. Step 3: Cross multiply
   3,939.54x = 5,878.58 × 3,590.22
4. Step 4: Simplify right side
   3,939.54x = 21,105,399.58
5. Step 5: Solve for x
   x = 21,105,399.58/3,939.54
6. Step 6: Final answer
   x = 5,357.33