Finding the Fourth Proportional to 13,196.62, 18,211.33 and 7,228.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.62 : 18,211.33 = 7,228.24 : x
2. Step 2: Convert to fraction form
   13,196.62/18,211.33 = 7,228.24/x
3. Step 3: Cross multiply
   13,196.62x = 18,211.33 × 7,228.24
4. Step 4: Simplify right side
   13,196.62x = 131,635,827.47
5. Step 5: Solve for x
   x = 131,635,827.47/13,196.62
6. Step 6: Final answer
   x = 9,974.96