Finding the Fourth Proportional to 2,164, 3,243.27 and 1,123.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164 : 3,243.27 = 1,123.81 : x
2. Step 2: Convert to fraction form
   2,164/3,243.27 = 1,123.81/x
3. Step 3: Cross multiply
   2,164x = 3,243.27 × 1,123.81
4. Step 4: Simplify right side
   2,164x = 3,644,819.26
5. Step 5: Solve for x
   x = 3,644,819.26/2,164
6. Step 6: Final answer
   x = 1,684.30