Finding the Fourth Proportional to 8,532.72, 12,791.27 and 7,224.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,532.72 : 12,791.27 = 7,224.89 : x
2. Step 2: Convert to fraction form
   8,532.72/12,791.27 = 7,224.89/x
3. Step 3: Cross multiply
   8,532.72x = 12,791.27 × 7,224.89
4. Step 4: Simplify right side
   8,532.72x = 92,415,472.82
5. Step 5: Solve for x
   x = 92,415,472.82/8,532.72
6. Step 6: Final answer
   x = 10,830.72