Finding the Fourth Proportional to 2,216.77, 3,059.15 and 1,222.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.77 : 3,059.15 = 1,222.04 : x
2. Step 2: Convert to fraction form
   2,216.77/3,059.15 = 1,222.04/x
3. Step 3: Cross multiply
   2,216.77x = 3,059.15 × 1,222.04
4. Step 4: Simplify right side
   2,216.77x = 3,738,394.87
5. Step 5: Solve for x
   x = 3,738,394.87/2,216.77
6. Step 6: Final answer
   x = 1,686.42