Finding the Fourth Proportional to 8,399.72, 11,591.61 and 5,211.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,399.72 : 11,591.61 = 5,211.83 : x
2. Step 2: Convert to fraction form
   8,399.72/11,591.61 = 5,211.83/x
3. Step 3: Cross multiply
   8,399.72x = 11,591.61 × 5,211.83
4. Step 4: Simplify right side
   8,399.72x = 60,413,510.18
5. Step 5: Solve for x
   x = 60,413,510.18/8,399.72
6. Step 6: Final answer
   x = 7,192.32