Finding the Fourth Proportional to 2,866.38, 3,959.37 and 2,308.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,866.38 : 3,959.37 = 2,308.90 : x
2. Step 2: Convert to fraction form
   2,866.38/3,959.37 = 2,308.90/x
3. Step 3: Cross multiply
   2,866.38x = 3,959.37 × 2,308.90
4. Step 4: Simplify right side
   2,866.38x = 9,141,777.85
5. Step 5: Solve for x
   x = 9,141,777.85/2,866.38
6. Step 6: Final answer
   x = 3,189.31