Finding the Fourth Proportional to 2,055.18, 3,081.55 and 823.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.18 : 3,081.55 = 823.17 : x
2. Step 2: Convert to fraction form
   2,055.18/3,081.55 = 823.17/x
3. Step 3: Cross multiply
   2,055.18x = 3,081.55 × 823.17
4. Step 4: Simplify right side
   2,055.18x = 2,536,639.51
5. Step 5: Solve for x
   x = 2,536,639.51/2,055.18
6. Step 6: Final answer
   x = 1,234.27