Finding the Fourth Proportional to 3,879.78, 5,354.52 and 2,308.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879.78 : 5,354.52 = 2,308.38 : x
2. Step 2: Convert to fraction form
   3,879.78/5,354.52 = 2,308.38/x
3. Step 3: Cross multiply
   3,879.78x = 5,354.52 × 2,308.38
4. Step 4: Simplify right side
   3,879.78x = 12,360,266.88
5. Step 5: Solve for x
   x = 12,360,266.88/3,879.78
6. Step 6: Final answer
   x = 3,185.82