Finding the Fourth Proportional to 12,067.92, 18,092.16 and 5,490.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,067.92 : 18,092.16 = 5,490.72 : x
2. Step 2: Convert to fraction form
   12,067.92/18,092.16 = 5,490.72/x
3. Step 3: Cross multiply
   12,067.92x = 18,092.16 × 5,490.72
4. Step 4: Simplify right side
   12,067.92x = 99,338,984.76
5. Step 5: Solve for x
   x = 99,338,984.76/12,067.92
6. Step 6: Final answer
   x = 8,231.66