Finding the Fourth Proportional to 2,216.02, 3,058.17 and 1,221.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.02 : 3,058.17 = 1,221.24 : x
2. Step 2: Convert to fraction form
   2,216.02/3,058.17 = 1,221.24/x
3. Step 3: Cross multiply
   2,216.02x = 3,058.17 × 1,221.24
4. Step 4: Simplify right side
   2,216.02x = 3,734,759.53
5. Step 5: Solve for x
   x = 3,734,759.53/2,216.02
6. Step 6: Final answer
   x = 1,685.35