Finding the Fourth Proportional to 2,523.10, 3,785.25 and 857.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,523.10 : 3,785.25 = 857.33 : x
2. Step 2: Convert to fraction form
   2,523.10/3,785.25 = 857.33/x
3. Step 3: Cross multiply
   2,523.10x = 3,785.25 × 857.33
4. Step 4: Simplify right side
   2,523.10x = 3,245,223.34
5. Step 5: Solve for x
   x = 3,245,223.34/2,523.10
6. Step 6: Final answer
   x = 1,286.21