Finding the Fourth Proportional to 2,569.41, 3,545.77 and 1,390.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,569.41 : 3,545.77 = 1,390.46 : x
2. Step 2: Convert to fraction form
   2,569.41/3,545.77 = 1,390.46/x
3. Step 3: Cross multiply
   2,569.41x = 3,545.77 × 1,390.46
4. Step 4: Simplify right side
   2,569.41x = 4,930,226.67
5. Step 5: Solve for x
   x = 4,930,226.67/2,569.41
6. Step 6: Final answer
   x = 1,918.82