Finding the Fourth Proportional to 3,963.69, 5,469.81 and 2,195.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,963.69 : 5,469.81 = 2,195.31 : x
2. Step 2: Convert to fraction form
   3,963.69/5,469.81 = 2,195.31/x
3. Step 3: Cross multiply
   3,963.69x = 5,469.81 × 2,195.31
4. Step 4: Simplify right side
   3,963.69x = 12,007,928.59
5. Step 5: Solve for x
   x = 12,007,928.59/3,963.69
6. Step 6: Final answer
   x = 3,029.48