Finding the Fourth Proportional to 2,881.76, 3,978.78 and 2,208.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,881.76 : 3,978.78 = 2,208.37 : x
2. Step 2: Convert to fraction form
   2,881.76/3,978.78 = 2,208.37/x
3. Step 3: Cross multiply
   2,881.76x = 3,978.78 × 2,208.37
4. Step 4: Simplify right side
   2,881.76x = 8,786,616.72
5. Step 5: Solve for x
   x = 8,786,616.72/2,881.76
6. Step 6: Final answer
   x = 3,049.05