Finding the Fourth Proportional to 2,568.39, 3,544.37 and 1,389.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.39 : 3,544.37 = 1,389.48 : x
2. Step 2: Convert to fraction form
   2,568.39/3,544.37 = 1,389.48/x
3. Step 3: Cross multiply
   2,568.39x = 3,544.37 × 1,389.48
4. Step 4: Simplify right side
   2,568.39x = 4,924,806.56
5. Step 5: Solve for x
   x = 4,924,806.56/2,568.39
6. Step 6: Final answer
   x = 1,917.47