Finding the Fourth Proportional to 4,181.78, 5,771.61 and 2,855.00

Step by Step Solution

1. Step 1: Write the proportion equation
   4,181.78 : 5,771.61 = 2,855.00 : x
2. Step 2: Convert to fraction form
   4,181.78/5,771.61 = 2,855.00/x
3. Step 3: Cross multiply
   4,181.78x = 5,771.61 × 2,855.00
4. Step 4: Simplify right side
   4,181.78x = 16,477,917.69
5. Step 5: Solve for x
   x = 16,477,917.69/4,181.78
6. Step 6: Final answer
   x = 3,940.41