Finding the Fourth Proportional to 13,185.93, 18,196.45 and 7,217.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.93 : 18,196.45 = 7,217.54 : x
2. Step 2: Convert to fraction form
   13,185.93/18,196.45 = 7,217.54/x
3. Step 3: Cross multiply
   13,185.93x = 18,196.45 × 7,217.54
4. Step 4: Simplify right side
   13,185.93x = 131,333,496.71
5. Step 5: Solve for x
   x = 131,333,496.71/13,185.93
6. Step 6: Final answer
   x = 9,960.12