Finding the Fourth Proportional to 2,568.30, 3,544.25 and 1,389.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.30 : 3,544.25 = 1,389.37 : x
2. Step 2: Convert to fraction form
   2,568.30/3,544.25 = 1,389.37/x
3. Step 3: Cross multiply
   2,568.30x = 3,544.25 × 1,389.37
4. Step 4: Simplify right side
   2,568.30x = 4,924,274.62
5. Step 5: Solve for x
   x = 4,924,274.62/2,568.30
6. Step 6: Final answer
   x = 1,917.33