Finding the Fourth Proportional to 12,019.86, 18,029.52 and 5,441.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,019.86 : 18,029.52 = 5,441.28 : x
2. Step 2: Convert to fraction form
   12,019.86/18,029.52 = 5,441.28/x
3. Step 3: Cross multiply
   12,019.86x = 18,029.52 × 5,441.28
4. Step 4: Simplify right side
   12,019.86x = 98,103,666.59
5. Step 5: Solve for x
   x = 98,103,666.59/12,019.86
6. Step 6: Final answer
   x = 8,161.80