Finding the Fourth Proportional to 2,499.36, 3,747.60 and 855.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.36 : 3,747.60 = 855.24 : x
2. Step 2: Convert to fraction form
   2,499.36/3,747.60 = 855.24/x
3. Step 3: Cross multiply
   2,499.36x = 3,747.60 × 855.24
4. Step 4: Simplify right side
   2,499.36x = 3,205,097.42
5. Step 5: Solve for x
   x = 3,205,097.42/2,499.36
6. Step 6: Final answer
   x = 1,282.37