Finding the Fourth Proportional to 13,185.66, 18,196.25 and 7,217.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.66 : 18,196.25 = 7,217.38 : x
2. Step 2: Convert to fraction form
   13,185.66/18,196.25 = 7,217.38/x
3. Step 3: Cross multiply
   13,185.66x = 18,196.25 × 7,217.38
4. Step 4: Simplify right side
   13,185.66x = 131,329,250.83
5. Step 5: Solve for x
   x = 131,329,250.83/13,185.66
6. Step 6: Final answer
   x = 9,960.01