Finding the Fourth Proportional to 2,500.88, 3,751.78 and 857.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.88 : 3,751.78 = 857.59 : x
2. Step 2: Convert to fraction form
   2,500.88/3,751.78 = 857.59/x
3. Step 3: Cross multiply
   2,500.88x = 3,751.78 × 857.59
4. Step 4: Simplify right side
   2,500.88x = 3,217,498.59
5. Step 5: Solve for x
   x = 3,217,498.59/2,500.88
6. Step 6: Final answer
   x = 1,286.55