Finding the Fourth Proportional to 8,849.98, 12,206.46 and 7,728.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,849.98 : 12,206.46 = 7,728.54 : x
2. Step 2: Convert to fraction form
   8,849.98/12,206.46 = 7,728.54/x
3. Step 3: Cross multiply
   8,849.98x = 12,206.46 × 7,728.54
4. Step 4: Simplify right side
   8,849.98x = 94,338,114.37
5. Step 5: Solve for x
   x = 94,338,114.37/8,849.98
6. Step 6: Final answer
   x = 10,659.70