Finding the Fourth Proportional to 3,909.68, 5,395.37 and 2,141.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.68 : 5,395.37 = 2,141.31 : x
2. Step 2: Convert to fraction form
   3,909.68/5,395.37 = 2,141.31/x
3. Step 3: Cross multiply
   3,909.68x = 5,395.37 × 2,141.31
4. Step 4: Simplify right side
   3,909.68x = 11,553,149.03
5. Step 5: Solve for x
   x = 11,553,149.03/3,909.68
6. Step 6: Final answer
   x = 2,955.02