Finding the Fourth Proportional to 2,578.68, 3,559.92 and 1,635.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.68 : 3,559.92 = 1,635.45 : x
2. Step 2: Convert to fraction form
   2,578.68/3,559.92 = 1,635.45/x
3. Step 3: Cross multiply
   2,578.68x = 3,559.92 × 1,635.45
4. Step 4: Simplify right side
   2,578.68x = 5,822,071.16
5. Step 5: Solve for x
   x = 5,822,071.16/2,578.68
6. Step 6: Final answer
   x = 2,257.77