Finding the Fourth Proportional to 2,867.98, 4,311.69 and 2,290.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,867.98 : 4,311.69 = 2,290.36 : x
2. Step 2: Convert to fraction form
   2,867.98/4,311.69 = 2,290.36/x
3. Step 3: Cross multiply
   2,867.98x = 4,311.69 × 2,290.36
4. Step 4: Simplify right side
   2,867.98x = 9,875,322.31
5. Step 5: Solve for x
   x = 9,875,322.31/2,867.98
6. Step 6: Final answer
   x = 3,443.30