Finding the Fourth Proportional to 2,499.09, 3,749.07 and 855.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.09 : 3,749.07 = 855.69 : x
2. Step 2: Convert to fraction form
   2,499.09/3,749.07 = 855.69/x
3. Step 3: Cross multiply
   2,499.09x = 3,749.07 × 855.69
4. Step 4: Simplify right side
   2,499.09x = 3,208,041.71
5. Step 5: Solve for x
   x = 3,208,041.71/2,499.09
6. Step 6: Final answer
   x = 1,283.68