Finding the Fourth Proportional to 9,500.72, 13,111.92 and 5,521.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,500.72 : 13,111.92 = 5,521.52 : x
2. Step 2: Convert to fraction form
   9,500.72/13,111.92 = 5,521.52/x
3. Step 3: Cross multiply
   9,500.72x = 13,111.92 × 5,521.52
4. Step 4: Simplify right side
   9,500.72x = 72,397,728.52
5. Step 5: Solve for x
   x = 72,397,728.52/9,500.72
6. Step 6: Final answer
   x = 7,620.24