Finding the Fourth Proportional to 2,206.83, 3,309.57 and 890.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,206.83 : 3,309.57 = 890.16 : x
2. Step 2: Convert to fraction form
   2,206.83/3,309.57 = 890.16/x
3. Step 3: Cross multiply
   2,206.83x = 3,309.57 × 890.16
4. Step 4: Simplify right side
   2,206.83x = 2,946,046.83
5. Step 5: Solve for x
   x = 2,946,046.83/2,206.83
6. Step 6: Final answer
   x = 1,334.97