Finding the Fourth Proportional to 2,227.18, 3,340.86 and 840.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.18 : 3,340.86 = 840.37 : x
2. Step 2: Convert to fraction form
   2,227.18/3,340.86 = 840.37/x
3. Step 3: Cross multiply
   2,227.18x = 3,340.86 × 840.37
4. Step 4: Simplify right side
   2,227.18x = 2,807,558.52
5. Step 5: Solve for x
   x = 2,807,558.52/2,227.18
6. Step 6: Final answer
   x = 1,260.59