Finding the Fourth Proportional to 12,704.42, 17,520.66 and 8,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,704.42 : 17,520.66 = 8,223.50 : x
2. Step 2: Convert to fraction form
   12,704.42/17,520.66 = 8,223.50/x
3. Step 3: Cross multiply
   12,704.42x = 17,520.66 × 8,223.50
4. Step 4: Simplify right side
   12,704.42x = 144,081,059.91
5. Step 5: Solve for x
   x = 144,081,059.91/12,704.42
6. Step 6: Final answer
   x = 11,341.02