Finding the Fourth Proportional to 12,155.13, 18,238.23 and 5,493.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.13 : 18,238.23 = 5,493.38 : x
2. Step 2: Convert to fraction form
   12,155.13/18,238.23 = 5,493.38/x
3. Step 3: Cross multiply
   12,155.13x = 18,238.23 × 5,493.38
4. Step 4: Simplify right side
   12,155.13x = 100,189,436.73
5. Step 5: Solve for x
   x = 100,189,436.73/12,155.13
6. Step 6: Final answer
   x = 8,242.56