Finding the Fourth Proportional to 9,072.72, 13,611.56 and 3,229.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.72 : 13,611.56 = 3,229.92 : x
2. Step 2: Convert to fraction form
   9,072.72/13,611.56 = 3,229.92/x
3. Step 3: Cross multiply
   9,072.72x = 13,611.56 × 3,229.92
4. Step 4: Simplify right side
   9,072.72x = 43,964,249.88
5. Step 5: Solve for x
   x = 43,964,249.88/9,072.72
6. Step 6: Final answer
   x = 4,845.76