Finding the Fourth Proportional to 3,581.78, 4,940.94 and 2,089.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,581.78 : 4,940.94 = 2,089.15 : x
2. Step 2: Convert to fraction form
   3,581.78/4,940.94 = 2,089.15/x
3. Step 3: Cross multiply
   3,581.78x = 4,940.94 × 2,089.15
4. Step 4: Simplify right side
   3,581.78x = 10,322,364.80
5. Step 5: Solve for x
   x = 10,322,364.80/3,581.78
6. Step 6: Final answer
   x = 2,881.91