Finding the Fourth Proportional to 2,578.69, 3,559.51 and 1,530.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.69 : 3,559.51 = 1,530.75 : x
2. Step 2: Convert to fraction form
   2,578.69/3,559.51 = 1,530.75/x
3. Step 3: Cross multiply
   2,578.69x = 3,559.51 × 1,530.75
4. Step 4: Simplify right side
   2,578.69x = 5,448,719.93
5. Step 5: Solve for x
   x = 5,448,719.93/2,578.69
6. Step 6: Final answer
   x = 2,112.98