Finding the Fourth Proportional to 13,196.55, 18,210.59 and 7,228.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.55 : 18,210.59 = 7,228.24 : x
2. Step 2: Convert to fraction form
   13,196.55/18,210.59 = 7,228.24/x
3. Step 3: Cross multiply
   13,196.55x = 18,210.59 × 7,228.24
4. Step 4: Simplify right side
   13,196.55x = 131,630,478.92
5. Step 5: Solve for x
   x = 131,630,478.92/13,196.55
6. Step 6: Final answer
   x = 9,974.62