Finding the Fourth Proportional to 12,911.20, 17,814.69 and 8,441.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,911.20 : 17,814.69 = 8,441.52 : x
2. Step 2: Convert to fraction form
   12,911.20/17,814.69 = 8,441.52/x
3. Step 3: Cross multiply
   12,911.20x = 17,814.69 × 8,441.52
4. Step 4: Simplify right side
   12,911.20x = 150,383,061.93
5. Step 5: Solve for x
   x = 150,383,061.93/12,911.20
6. Step 6: Final answer
   x = 11,647.49