Finding the Fourth Proportional to 2,864.76, 4,290.72 and 2,489.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.76 : 4,290.72 = 2,489.76 : x
2. Step 2: Convert to fraction form
   2,864.76/4,290.72 = 2,489.76/x
3. Step 3: Cross multiply
   2,864.76x = 4,290.72 × 2,489.76
4. Step 4: Simplify right side
   2,864.76x = 10,682,863.03
5. Step 5: Solve for x
   x = 10,682,863.03/2,864.76
6. Step 6: Final answer
   x = 3,729.06