Finding the Fourth Proportional to 2,499.50, 3,745.15 and 855.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.50 : 3,745.15 = 855.15 : x
2. Step 2: Convert to fraction form
   2,499.50/3,745.15 = 855.15/x
3. Step 3: Cross multiply
   2,499.50x = 3,745.15 × 855.15
4. Step 4: Simplify right side
   2,499.50x = 3,202,665.02
5. Step 5: Solve for x
   x = 3,202,665.02/2,499.50
6. Step 6: Final answer
   x = 1,281.32