Finding the Fourth Proportional to 12,081.85, 16,665.28 and 8,729.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.85 : 16,665.28 = 8,729.58 : x
2. Step 2: Convert to fraction form
   12,081.85/16,665.28 = 8,729.58/x
3. Step 3: Cross multiply
   12,081.85x = 16,665.28 × 8,729.58
4. Step 4: Simplify right side
   12,081.85x = 145,480,935.65
5. Step 5: Solve for x
   x = 145,480,935.65/12,081.85
6. Step 6: Final answer
   x = 12,041.28