Finding the Fourth Proportional to 2,498.78, 3,744.08 and 854.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,498.78 : 3,744.08 = 854.43 : x
2. Step 2: Convert to fraction form
   2,498.78/3,744.08 = 854.43/x
3. Step 3: Cross multiply
   2,498.78x = 3,744.08 × 854.43
4. Step 4: Simplify right side
   2,498.78x = 3,199,050.00
5. Step 5: Solve for x
   x = 3,199,050.00/2,498.78
6. Step 6: Final answer
   x = 1,280.25