Finding the Fourth Proportional to 2,391.88, 3,601.81 and 2,087.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.88 : 3,601.81 = 2,087.38 : x
2. Step 2: Convert to fraction form
   2,391.88/3,601.81 = 2,087.38/x
3. Step 3: Cross multiply
   2,391.88x = 3,601.81 × 2,087.38
4. Step 4: Simplify right side
   2,391.88x = 7,518,346.16
5. Step 5: Solve for x
   x = 7,518,346.16/2,391.88
6. Step 6: Final answer
   x = 3,143.28