Finding the Fourth Proportional to 2,216.91, 3,059.52 and 1,222.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.91 : 3,059.52 = 1,222.38 : x
2. Step 2: Convert to fraction form
   2,216.91/3,059.52 = 1,222.38/x
3. Step 3: Cross multiply
   2,216.91x = 3,059.52 × 1,222.38
4. Step 4: Simplify right side
   2,216.91x = 3,739,896.06
5. Step 5: Solve for x
   x = 3,739,896.06/2,216.91
6. Step 6: Final answer
   x = 1,686.99