Finding the Fourth Proportional to 2,568.29, 3,544.23 and 1,389.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.29 : 3,544.23 = 1,389.35 : x
2. Step 2: Convert to fraction form
   2,568.29/3,544.23 = 1,389.35/x
3. Step 3: Cross multiply
   2,568.29x = 3,544.23 × 1,389.35
4. Step 4: Simplify right side
   2,568.29x = 4,924,184.81
5. Step 5: Solve for x
   x = 4,924,184.81/2,568.29
6. Step 6: Final answer
   x = 1,917.30