Finding the Fourth Proportional to 9,216.50, 12,718.28 and 5,809.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,216.50 : 12,718.28 = 5,809.55 : x
2. Step 2: Convert to fraction form
   9,216.50/12,718.28 = 5,809.55/x
3. Step 3: Cross multiply
   9,216.50x = 12,718.28 × 5,809.55
4. Step 4: Simplify right side
   9,216.50x = 73,887,529.89
5. Step 5: Solve for x
   x = 73,887,529.89/9,216.50
6. Step 6: Final answer
   x = 8,016.88