Finding the Fourth Proportional to 2,054.57, 3,078.61 and 1,231.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.57 : 3,078.61 = 1,231.81 : x
2. Step 2: Convert to fraction form
   2,054.57/3,078.61 = 1,231.81/x
3. Step 3: Cross multiply
   2,054.57x = 3,078.61 × 1,231.81
4. Step 4: Simplify right side
   2,054.57x = 3,792,251.81
5. Step 5: Solve for x
   x = 3,792,251.81/2,054.57
6. Step 6: Final answer
   x = 1,845.77