Finding the Fourth Proportional to 11,132.40, 16,665.78 and 8,223.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,132.40 : 16,665.78 = 8,223.69 : x
2. Step 2: Convert to fraction form
   11,132.40/16,665.78 = 8,223.69/x
3. Step 3: Cross multiply
   11,132.40x = 16,665.78 × 8,223.69
4. Step 4: Simplify right side
   11,132.40x = 137,054,208.33
5. Step 5: Solve for x
   x = 137,054,208.33/11,132.40
6. Step 6: Final answer
   x = 12,311.29