Finding the Fourth Proportional to 13,311.72, 19,934.76 and 8,369.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.72 : 19,934.76 = 8,369.10 : x
2. Step 2: Convert to fraction form
   13,311.72/19,934.76 = 8,369.10/x
3. Step 3: Cross multiply
   13,311.72x = 19,934.76 × 8,369.10
4. Step 4: Simplify right side
   13,311.72x = 166,835,999.92
5. Step 5: Solve for x
   x = 166,835,999.92/13,311.72
6. Step 6: Final answer
   x = 12,533.02