Finding the Fourth Proportional to 3,140.37, 4,323.78 and 2,391.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,140.37 : 4,323.78 = 2,391.93 : x
2. Step 2: Convert to fraction form
   3,140.37/4,323.78 = 2,391.93/x
3. Step 3: Cross multiply
   3,140.37x = 4,323.78 × 2,391.93
4. Step 4: Simplify right side
   3,140.37x = 10,342,179.10
5. Step 5: Solve for x
   x = 10,342,179.10/3,140.37
6. Step 6: Final answer
   x = 3,293.30