Finding the Fourth Proportional to 2,498.99, 3,748.89 and 855.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,498.99 : 3,748.89 = 855.20 : x
2. Step 2: Convert to fraction form
   2,498.99/3,748.89 = 855.20/x
3. Step 3: Cross multiply
   2,498.99x = 3,748.89 × 855.20
4. Step 4: Simplify right side
   2,498.99x = 3,206,050.73
5. Step 5: Solve for x
   x = 3,206,050.73/2,498.99
6. Step 6: Final answer
   x = 1,282.94