Finding the Fourth Proportional to 2,218.07, 3,329.18 and 1,123.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.07 : 3,329.18 = 1,123.22 : x
2. Step 2: Convert to fraction form
   2,218.07/3,329.18 = 1,123.22/x
3. Step 3: Cross multiply
   2,218.07x = 3,329.18 × 1,123.22
4. Step 4: Simplify right side
   2,218.07x = 3,739,379.30
5. Step 5: Solve for x
   x = 3,739,379.30/2,218.07
6. Step 6: Final answer
   x = 1,685.87