Finding the Fourth Proportional to 5,208.54, 7,187.78 and 2,850.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,208.54 : 7,187.78 = 2,850.72 : x
2. Step 2: Convert to fraction form
   5,208.54/7,187.78 = 2,850.72/x
3. Step 3: Cross multiply
   5,208.54x = 7,187.78 × 2,850.72
4. Step 4: Simplify right side
   5,208.54x = 20,490,333.95
5. Step 5: Solve for x
   x = 20,490,333.95/5,208.54
6. Step 6: Final answer
   x = 3,933.99