Finding the Fourth Proportional to 12,086.82, 18,128.68 and 3,322.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.82 : 18,128.68 = 3,322.42 : x
2. Step 2: Convert to fraction form
   12,086.82/18,128.68 = 3,322.42/x
3. Step 3: Cross multiply
   12,086.82x = 18,128.68 × 3,322.42
4. Step 4: Simplify right side
   12,086.82x = 60,231,035.38
5. Step 5: Solve for x
   x = 60,231,035.38/12,086.82
6. Step 6: Final answer
   x = 4,983.20