Finding the Fourth Proportional to 12,154.34, 18,224.55 and 7,227.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,154.34 : 18,224.55 = 7,227.42 : x
2. Step 2: Convert to fraction form
   12,154.34/18,224.55 = 7,227.42/x
3. Step 3: Cross multiply
   12,154.34x = 18,224.55 × 7,227.42
4. Step 4: Simplify right side
   12,154.34x = 131,716,477.16
5. Step 5: Solve for x
   x = 131,716,477.16/12,154.34
6. Step 6: Final answer
   x = 10,836.99