Finding the Fourth Proportional to 21,447.72, 29,595.06 and 12,018

Step by Step Solution

1. Step 1: Write the proportion equation
   21,447.72 : 29,595.06 = 12,018 : x
2. Step 2: Convert to fraction form
   21,447.72/29,595.06 = 12,018/x
3. Step 3: Cross multiply
   21,447.72x = 29,595.06 × 12,018
4. Step 4: Simplify right side
   21,447.72x = 355,673,431.08
5. Step 5: Solve for x
   x = 355,673,431.08/21,447.72
6. Step 6: Final answer
   x = 16,583.27