Finding the Fourth Proportional to 3,391.31, 5,086.27 and 2,141.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.31 : 5,086.27 = 2,141.53 : x
2. Step 2: Convert to fraction form
   3,391.31/5,086.27 = 2,141.53/x
3. Step 3: Cross multiply
   3,391.31x = 5,086.27 × 2,141.53
4. Step 4: Simplify right side
   3,391.31x = 10,892,399.79
5. Step 5: Solve for x
   x = 10,892,399.79/3,391.31
6. Step 6: Final answer
   x = 3,211.86