Finding the Fourth Proportional to 12,433.28, 18,644.34 and 3,665.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,433.28 : 18,644.34 = 3,665.12 : x
2. Step 2: Convert to fraction form
   12,433.28/18,644.34 = 3,665.12/x
3. Step 3: Cross multiply
   12,433.28x = 18,644.34 × 3,665.12
4. Step 4: Simplify right side
   12,433.28x = 68,333,743.42
5. Step 5: Solve for x
   x = 68,333,743.42/12,433.28
6. Step 6: Final answer
   x = 5,496.04