Finding the Fourth Proportional to 3,867.91, 5,790.58 and 3,498.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867.91 : 5,790.58 = 3,498.57 : x
2. Step 2: Convert to fraction form
   3,867.91/5,790.58 = 3,498.57/x
3. Step 3: Cross multiply
   3,867.91x = 5,790.58 × 3,498.57
4. Step 4: Simplify right side
   3,867.91x = 20,258,740.72
5. Step 5: Solve for x
   x = 20,258,740.72/3,867.91
6. Step 6: Final answer
   x = 5,237.65