Finding the Fourth Proportional to 12,042.72, 18,099.72 and 9,975.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,042.72 : 18,099.72 = 9,975.96 : x
2. Step 2: Convert to fraction form
   12,042.72/18,099.72 = 9,975.96/x
3. Step 3: Cross multiply
   12,042.72x = 18,099.72 × 9,975.96
4. Step 4: Simplify right side
   12,042.72x = 180,562,082.73
5. Step 5: Solve for x
   x = 180,562,082.73/12,042.72
6. Step 6: Final answer
   x = 14,993.46