Finding the Fourth Proportional to 3,871.52, 5,342.72 and 2,278.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.52 : 5,342.72 = 2,278.23 : x
2. Step 2: Convert to fraction form
   3,871.52/5,342.72 = 2,278.23/x
3. Step 3: Cross multiply
   3,871.52x = 5,342.72 × 2,278.23
4. Step 4: Simplify right side
   3,871.52x = 12,171,913.56
5. Step 5: Solve for x
   x = 12,171,913.56/3,871.52
6. Step 6: Final answer
   x = 3,143.96