Finding the Fourth Proportional to 12,723.94, 17,540.58 and 8,935.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,723.94 : 17,540.58 = 8,935.57 : x
2. Step 2: Convert to fraction form
   12,723.94/17,540.58 = 8,935.57/x
3. Step 3: Cross multiply
   12,723.94x = 17,540.58 × 8,935.57
4. Step 4: Simplify right side
   12,723.94x = 156,735,080.43
5. Step 5: Solve for x
   x = 156,735,080.43/12,723.94
6. Step 6: Final answer
   x = 12,318.12