Finding the Fourth Proportional to 2,218.86, 3,328.17 and 1,123.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.86 : 3,328.17 = 1,123.19 : x
2. Step 2: Convert to fraction form
   2,218.86/3,328.17 = 1,123.19/x
3. Step 3: Cross multiply
   2,218.86x = 3,328.17 × 1,123.19
4. Step 4: Simplify right side
   2,218.86x = 3,738,172.20
5. Step 5: Solve for x
   x = 3,738,172.20/2,218.86
6. Step 6: Final answer
   x = 1,684.73