Finding the Fourth Proportional to 2,216.74, 3,058.98 and 1,222.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.74 : 3,058.98 = 1,222.02 : x
2. Step 2: Convert to fraction form
   2,216.74/3,058.98 = 1,222.02/x
3. Step 3: Cross multiply
   2,216.74x = 3,058.98 × 1,222.02
4. Step 4: Simplify right side
   2,216.74x = 3,738,134.74
5. Step 5: Solve for x
   x = 3,738,134.74/2,216.74
6. Step 6: Final answer
   x = 1,686.32