Finding the Fourth Proportional to 2,218.18, 3,329.31 and 1,123.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.18 : 3,329.31 = 1,123.33 : x
2. Step 2: Convert to fraction form
   2,218.18/3,329.31 = 1,123.33/x
3. Step 3: Cross multiply
   2,218.18x = 3,329.31 × 1,123.33
4. Step 4: Simplify right side
   2,218.18x = 3,739,913.80
5. Step 5: Solve for x
   x = 3,739,913.80/2,218.18
6. Step 6: Final answer
   x = 1,686.03