Finding the Fourth Proportional to 13,204.86, 18,222.72 and 7,236.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,204.86 : 18,222.72 = 7,236.42 : x
2. Step 2: Convert to fraction form
   13,204.86/18,222.72 = 7,236.42/x
3. Step 3: Cross multiply
   13,204.86x = 18,222.72 × 7,236.42
4. Step 4: Simplify right side
   13,204.86x = 131,867,255.46
5. Step 5: Solve for x
   x = 131,867,255.46/13,204.86
6. Step 6: Final answer
   x = 9,986.27