Finding the Fourth Proportional to 3,847.78, 5,311.31 and 2,275.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,847.78 : 5,311.31 = 2,275.88 : x
2. Step 2: Convert to fraction form
   3,847.78/5,311.31 = 2,275.88/x
3. Step 3: Cross multiply
   3,847.78x = 5,311.31 × 2,275.88
4. Step 4: Simplify right side
   3,847.78x = 12,087,866.27
5. Step 5: Solve for x
   x = 12,087,866.27/3,847.78
6. Step 6: Final answer
   x = 3,141.52