Finding the Fourth Proportional to 9,204.72, 12,704.22 and 8,642.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,204.72 : 12,704.22 = 8,642.04 : x
2. Step 2: Convert to fraction form
   9,204.72/12,704.22 = 8,642.04/x
3. Step 3: Cross multiply
   9,204.72x = 12,704.22 × 8,642.04
4. Step 4: Simplify right side
   9,204.72x = 109,790,377.41
5. Step 5: Solve for x
   x = 109,790,377.41/9,204.72
6. Step 6: Final answer
   x = 11,927.62