Finding the Fourth Proportional to 2,540.42, 3,808.28 and 979.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.42 : 3,808.28 = 979.95 : x
2. Step 2: Convert to fraction form
   2,540.42/3,808.28 = 979.95/x
3. Step 3: Cross multiply
   2,540.42x = 3,808.28 × 979.95
4. Step 4: Simplify right side
   2,540.42x = 3,731,919.09
5. Step 5: Solve for x
   x = 3,731,919.09/2,540.42
6. Step 6: Final answer
   x = 1,469.02