Finding the Fourth Proportional to 3,870.27, 5,339.21 and 2,276.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.27 : 5,339.21 = 2,276.42 : x
2. Step 2: Convert to fraction form
   3,870.27/5,339.21 = 2,276.42/x
3. Step 3: Cross multiply
   3,870.27x = 5,339.21 × 2,276.42
4. Step 4: Simplify right side
   3,870.27x = 12,154,246.35
5. Step 5: Solve for x
   x = 12,154,246.35/3,870.27
6. Step 6: Final answer
   x = 3,140.41