Finding the Fourth Proportional to 3,963.21, 5,939.28 and 3,375.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,963.21 : 5,939.28 = 3,375.15 : x
2. Step 2: Convert to fraction form
   3,963.21/5,939.28 = 3,375.15/x
3. Step 3: Cross multiply
   3,963.21x = 5,939.28 × 3,375.15
4. Step 4: Simplify right side
   3,963.21x = 20,045,960.89
5. Step 5: Solve for x
   x = 20,045,960.89/3,963.21
6. Step 6: Final answer
   x = 5,058.01