Finding the Fourth Proportional to 13,185.59, 18,196.17 and 7,217.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.59 : 18,196.17 = 7,217.33 : x
2. Step 2: Convert to fraction form
   13,185.59/18,196.17 = 7,217.33/x
3. Step 3: Cross multiply
   13,185.59x = 18,196.17 × 7,217.33
4. Step 4: Simplify right side
   13,185.59x = 131,327,763.63
5. Step 5: Solve for x
   x = 131,327,763.63/13,185.59
6. Step 6: Final answer
   x = 9,959.95