Finding the Fourth Proportional to 2,569.22, 3,545.52 and 1,390.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,569.22 : 3,545.52 = 1,390.29 : x
2. Step 2: Convert to fraction form
   2,569.22/3,545.52 = 1,390.29/x
3. Step 3: Cross multiply
   2,569.22x = 3,545.52 × 1,390.29
4. Step 4: Simplify right side
   2,569.22x = 4,929,300.28
5. Step 5: Solve for x
   x = 4,929,300.28/2,569.22
6. Step 6: Final answer
   x = 1,918.60