Finding the Fourth Proportional to 9,860.72, 14,791.85 and 3,286.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.72 : 14,791.85 = 3,286.91 : x
2. Step 2: Convert to fraction form
   9,860.72/14,791.85 = 3,286.91/x
3. Step 3: Cross multiply
   9,860.72x = 14,791.85 × 3,286.91
4. Step 4: Simplify right side
   9,860.72x = 48,619,443.22
5. Step 5: Solve for x
   x = 48,619,443.22/9,860.72
6. Step 6: Final answer
   x = 4,930.62