Finding the Fourth Proportional to 2,227.46, 3,340.71 and 840.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.46 : 3,340.71 = 840.76 : x
2. Step 2: Convert to fraction form
   2,227.46/3,340.71 = 840.76/x
3. Step 3: Cross multiply
   2,227.46x = 3,340.71 × 840.76
4. Step 4: Simplify right side
   2,227.46x = 2,808,735.34
5. Step 5: Solve for x
   x = 2,808,735.34/2,227.46
6. Step 6: Final answer
   x = 1,260.96