Finding the Fourth Proportional to 2,216.99, 3,059.33 and 1,222.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.99 : 3,059.33 = 1,222.27 : x
2. Step 2: Convert to fraction form
   2,216.99/3,059.33 = 1,222.27/x
3. Step 3: Cross multiply
   2,216.99x = 3,059.33 × 1,222.27
4. Step 4: Simplify right side
   2,216.99x = 3,739,313.52
5. Step 5: Solve for x
   x = 3,739,313.52/2,216.99
6. Step 6: Final answer
   x = 1,686.66