Finding the Fourth Proportional to 13,311.19, 18,369.54 and 7,342.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.19 : 18,369.54 = 7,342.71 : x
2. Step 2: Convert to fraction form
   13,311.19/18,369.54 = 7,342.71/x
3. Step 3: Cross multiply
   13,311.19x = 18,369.54 × 7,342.71
4. Step 4: Simplify right side
   13,311.19x = 134,882,205.05
5. Step 5: Solve for x
   x = 134,882,205.05/13,311.19
6. Step 6: Final answer
   x = 10,132.99