Finding the Fourth Proportional to 13,196.02, 18,209.73 and 7,226.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.02 : 18,209.73 = 7,226.50 : x
2. Step 2: Convert to fraction form
   13,196.02/18,209.73 = 7,226.50/x
3. Step 3: Cross multiply
   13,196.02x = 18,209.73 × 7,226.50
4. Step 4: Simplify right side
   13,196.02x = 131,592,613.85
5. Step 5: Solve for x
   x = 131,592,613.85/13,196.02
6. Step 6: Final answer
   x = 9,972.14