Finding the Fourth Proportional to 12,018.92, 18,037.49 and 5,449.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.92 : 18,037.49 = 5,449.61 : x
2. Step 2: Convert to fraction form
   12,018.92/18,037.49 = 5,449.61/x
3. Step 3: Cross multiply
   12,018.92x = 18,037.49 × 5,449.61
4. Step 4: Simplify right side
   12,018.92x = 98,297,303.72
5. Step 5: Solve for x
   x = 98,297,303.72/12,018.92
6. Step 6: Final answer
   x = 8,178.55