Finding the Fourth Proportional to 2,569.17, 3,545.46 and 1,390.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,569.17 : 3,545.46 = 1,390.24 : x
2. Step 2: Convert to fraction form
   2,569.17/3,545.46 = 1,390.24/x
3. Step 3: Cross multiply
   2,569.17x = 3,545.46 × 1,390.24
4. Step 4: Simplify right side
   2,569.17x = 4,929,025.34
5. Step 5: Solve for x
   x = 4,929,025.34/2,569.17
6. Step 6: Final answer
   x = 1,918.53