Finding the Fourth Proportional to 3,128.27, 4,336.75 and 2,961.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.27 : 4,336.75 = 2,961.82 : x
2. Step 2: Convert to fraction form
   3,128.27/4,336.75 = 2,961.82/x
3. Step 3: Cross multiply
   3,128.27x = 4,336.75 × 2,961.82
4. Step 4: Simplify right side
   3,128.27x = 12,844,636.39
5. Step 5: Solve for x
   x = 12,844,636.39/3,128.27
6. Step 6: Final answer
   x = 4,105.99