Finding the Fourth Proportional to 2,890.54, 3,990.42 and 2,004.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.54 : 3,990.42 = 2,004.81 : x
2. Step 2: Convert to fraction form
   2,890.54/3,990.42 = 2,004.81/x
3. Step 3: Cross multiply
   2,890.54x = 3,990.42 × 2,004.81
4. Step 4: Simplify right side
   2,890.54x = 8,000,033.92
5. Step 5: Solve for x
   x = 8,000,033.92/2,890.54
6. Step 6: Final answer
   x = 2,767.66