Finding the Fourth Proportional to 12,704.42, 17,513.73 and 8,915.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,704.42 : 17,513.73 = 8,915.85 : x
2. Step 2: Convert to fraction form
   12,704.42/17,513.73 = 8,915.85/x
3. Step 3: Cross multiply
   12,704.42x = 17,513.73 × 8,915.85
4. Step 4: Simplify right side
   12,704.42x = 156,149,789.62
5. Step 5: Solve for x
   x = 156,149,789.62/12,704.42
6. Step 6: Final answer
   x = 12,290.99