Finding the Fourth Proportional to 12,166.72, 18,235.50 and 7,225.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,166.72 : 18,235.50 = 7,225.72 : x
2. Step 2: Convert to fraction form
   12,166.72/18,235.50 = 7,225.72/x
3. Step 3: Cross multiply
   12,166.72x = 18,235.50 × 7,225.72
4. Step 4: Simplify right side
   12,166.72x = 131,764,617.06
5. Step 5: Solve for x
   x = 131,764,617.06/12,166.72
6. Step 6: Final answer
   x = 10,829.92