Finding the Fourth Proportional to 2,218.35, 3,329.58 and 1,123.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.35 : 3,329.58 = 1,123.49 : x
2. Step 2: Convert to fraction form
   2,218.35/3,329.58 = 1,123.49/x
3. Step 3: Cross multiply
   2,218.35x = 3,329.58 × 1,123.49
4. Step 4: Simplify right side
   2,218.35x = 3,740,733.19
5. Step 5: Solve for x
   x = 3,740,733.19/2,218.35
6. Step 6: Final answer
   x = 1,686.27