Finding the Fourth Proportional to 2,568.64, 3,544.78 and 1,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.64 : 3,544.78 = 1,520.72 : x
2. Step 2: Convert to fraction form
   2,568.64/3,544.78 = 1,520.72/x
3. Step 3: Cross multiply
   2,568.64x = 3,544.78 × 1,520.72
4. Step 4: Simplify right side
   2,568.64x = 5,390,617.84
5. Step 5: Solve for x
   x = 5,390,617.84/2,568.64
6. Step 6: Final answer
   x = 2,098.63