Finding the Fourth Proportional to 2,881.32, 3,978.59 and 2,042.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,881.32 : 3,978.59 = 2,042.97 : x
2. Step 2: Convert to fraction form
   2,881.32/3,978.59 = 2,042.97/x
3. Step 3: Cross multiply
   2,881.32x = 3,978.59 × 2,042.97
4. Step 4: Simplify right side
   2,881.32x = 8,128,154.49
5. Step 5: Solve for x
   x = 8,128,154.49/2,881.32
6. Step 6: Final answer
   x = 2,820.98