Finding the Fourth Proportional to 2,499.05, 3,749.15 and 855.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.05 : 3,749.15 = 855.60 : x
2. Step 2: Convert to fraction form
   2,499.05/3,749.15 = 855.60/x
3. Step 3: Cross multiply
   2,499.05x = 3,749.15 × 855.60
4. Step 4: Simplify right side
   2,499.05x = 3,207,760.82
5. Step 5: Solve for x
   x = 3,207,760.82/2,499.05
6. Step 6: Final answer
   x = 1,283.59