Finding the Fourth Proportional to 2,216.27, 3,058.49 and 1,221.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.27 : 3,058.49 = 1,221.46 : x
2. Step 2: Convert to fraction form
   2,216.27/3,058.49 = 1,221.46/x
3. Step 3: Cross multiply
   2,216.27x = 3,058.49 × 1,221.46
4. Step 4: Simplify right side
   2,216.27x = 3,735,818.60
5. Step 5: Solve for x
   x = 3,735,818.60/2,216.27
6. Step 6: Final answer
   x = 1,685.63