Finding the Fourth Proportional to 2,258.67, 3,111.57 and 1,857.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.67 : 3,111.57 = 1,857.72 : x
2. Step 2: Convert to fraction form
   2,258.67/3,111.57 = 1,857.72/x
3. Step 3: Cross multiply
   2,258.67x = 3,111.57 × 1,857.72
4. Step 4: Simplify right side
   2,258.67x = 5,780,425.82
5. Step 5: Solve for x
   x = 5,780,425.82/2,258.67
6. Step 6: Final answer
   x = 2,559.22