Finding the Fourth Proportional to 2,890.50, 3,990.69 and 2,226.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.50 : 3,990.69 = 2,226.09 : x
2. Step 2: Convert to fraction form
   2,890.50/3,990.69 = 2,226.09/x
3. Step 3: Cross multiply
   2,890.50x = 3,990.69 × 2,226.09
4. Step 4: Simplify right side
   2,890.50x = 8,883,635.10
5. Step 5: Solve for x
   x = 8,883,635.10/2,890.50
6. Step 6: Final answer
   x = 3,073.39