Finding the Fourth Proportional to 2,578.69, 3,557.89 and 1,694.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.69 : 3,557.89 = 1,694.78 : x
2. Step 2: Convert to fraction form
   2,578.69/3,557.89 = 1,694.78/x
3. Step 3: Cross multiply
   2,578.69x = 3,557.89 × 1,694.78
4. Step 4: Simplify right side
   2,578.69x = 6,029,840.81
5. Step 5: Solve for x
   x = 6,029,840.81/2,578.69
6. Step 6: Final answer
   x = 2,338.33