Finding the Fourth Proportional to 2,881.51, 3,978.48 and 2,208.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,881.51 : 3,978.48 = 2,208.15 : x
2. Step 2: Convert to fraction form
   2,881.51/3,978.48 = 2,208.15/x
3. Step 3: Cross multiply
   2,881.51x = 3,978.48 × 2,208.15
4. Step 4: Simplify right side
   2,881.51x = 8,785,080.61
5. Step 5: Solve for x
   x = 8,785,080.61/2,881.51
6. Step 6: Final answer
   x = 3,048.78