Finding the Fourth Proportional to 12,198.27, 18,293.78 and 5,178.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,198.27 : 18,293.78 = 5,178.18 : x
2. Step 2: Convert to fraction form
   12,198.27/18,293.78 = 5,178.18/x
3. Step 3: Cross multiply
   12,198.27x = 18,293.78 × 5,178.18
4. Step 4: Simplify right side
   12,198.27x = 94,728,459.83
5. Step 5: Solve for x
   x = 94,728,459.83/12,198.27
6. Step 6: Final answer
   x = 7,765.73