Finding the Fourth Proportional to 2,568.53, 3,544.56 and 1,389.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.53 : 3,544.56 = 1,389.58 : x
2. Step 2: Convert to fraction form
   2,568.53/3,544.56 = 1,389.58/x
3. Step 3: Cross multiply
   2,568.53x = 3,544.56 × 1,389.58
4. Step 4: Simplify right side
   2,568.53x = 4,925,440.82
5. Step 5: Solve for x
   x = 4,925,440.82/2,568.53
6. Step 6: Final answer
   x = 1,917.61