Finding the Fourth Proportional to 2,218.30, 3,329.50 and 1,123.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.30 : 3,329.50 = 1,123.43 : x
2. Step 2: Convert to fraction form
   2,218.30/3,329.50 = 1,123.43/x
3. Step 3: Cross multiply
   2,218.30x = 3,329.50 × 1,123.43
4. Step 4: Simplify right side
   2,218.30x = 3,740,460.19
5. Step 5: Solve for x
   x = 3,740,460.19/2,218.30
6. Step 6: Final answer
   x = 1,686.18