Finding the Fourth Proportional to 13,311.22, 18,369.50 and 7,342.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.22 : 18,369.50 = 7,342.89 : x
2. Step 2: Convert to fraction form
   13,311.22/18,369.50 = 7,342.89/x
3. Step 3: Cross multiply
   13,311.22x = 18,369.50 × 7,342.89
4. Step 4: Simplify right side
   13,311.22x = 134,885,217.86
5. Step 5: Solve for x
   x = 134,885,217.86/13,311.22
6. Step 6: Final answer
   x = 10,133.20