Finding the Fourth Proportional to 2,218.03, 3,329.10 and 1,123.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.03 : 3,329.10 = 1,123.17 : x
2. Step 2: Convert to fraction form
   2,218.03/3,329.10 = 1,123.17/x
3. Step 3: Cross multiply
   2,218.03x = 3,329.10 × 1,123.17
4. Step 4: Simplify right side
   2,218.03x = 3,739,145.25
5. Step 5: Solve for x
   x = 3,739,145.25/2,218.03
6. Step 6: Final answer
   x = 1,685.80