Finding the Fourth Proportional to 13,185.92, 18,195.86 and 7,216.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.92 : 18,195.86 = 7,216.43 : x
2. Step 2: Convert to fraction form
   13,185.92/18,195.86 = 7,216.43/x
3. Step 3: Cross multiply
   13,185.92x = 18,195.86 × 7,216.43
4. Step 4: Simplify right side
   13,185.92x = 131,309,022.92
5. Step 5: Solve for x
   x = 131,309,022.92/13,185.92
6. Step 6: Final answer
   x = 9,958.28