Finding the Fourth Proportional to 3,870.38, 5,340.68 and 2,276.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.38 : 5,340.68 = 2,276.76 : x
2. Step 2: Convert to fraction form
   3,870.38/5,340.68 = 2,276.76/x
3. Step 3: Cross multiply
   3,870.38x = 5,340.68 × 2,276.76
4. Step 4: Simplify right side
   3,870.38x = 12,159,446.54
5. Step 5: Solve for x
   x = 12,159,446.54/3,870.38
6. Step 6: Final answer
   x = 3,141.67