Finding the Fourth Proportional to 3,311.69, 4,960.43 and 3,117.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,311.69 : 4,960.43 = 3,117.83 : x
2. Step 2: Convert to fraction form
   3,311.69/4,960.43 = 3,117.83/x
3. Step 3: Cross multiply
   3,311.69x = 4,960.43 × 3,117.83
4. Step 4: Simplify right side
   3,311.69x = 15,465,761.88
5. Step 5: Solve for x
   x = 15,465,761.88/3,311.69
6. Step 6: Final answer
   x = 4,670.05