Finding the Fourth Proportional to 13,900.50, 19,182.83 and 8,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,900.50 : 19,182.83 = 8,311.50 : x
2. Step 2: Convert to fraction form
   13,900.50/19,182.83 = 8,311.50/x
3. Step 3: Cross multiply
   13,900.50x = 19,182.83 × 8,311.50
4. Step 4: Simplify right side
   13,900.50x = 159,438,049.99
5. Step 5: Solve for x
   x = 159,438,049.99/13,900.50
6. Step 6: Final answer
   x = 11,469.95