Finding the Fourth Proportional to 12,286.53, 18,425.79 and 3,964.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,286.53 : 18,425.79 = 3,964.59 : x
2. Step 2: Convert to fraction form
   12,286.53/18,425.79 = 3,964.59/x
3. Step 3: Cross multiply
   12,286.53x = 18,425.79 × 3,964.59
4. Step 4: Simplify right side
   12,286.53x = 73,050,702.78
5. Step 5: Solve for x
   x = 73,050,702.78/12,286.53
6. Step 6: Final answer
   x = 5,945.59