Finding the Fourth Proportional to 2,617.82, 3,923.39 and 1,228.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.82 : 3,923.39 = 1,228.09 : x
2. Step 2: Convert to fraction form
   2,617.82/3,923.39 = 1,228.09/x
3. Step 3: Cross multiply
   2,617.82x = 3,923.39 × 1,228.09
4. Step 4: Simplify right side
   2,617.82x = 4,818,276.03
5. Step 5: Solve for x
   x = 4,818,276.03/2,617.82
6. Step 6: Final answer
   x = 1,840.57