Finding the Fourth Proportional to 3,960.54, 5,939.06 and 2,111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.54 : 5,939.06 = 2,111.31 : x
2. Step 2: Convert to fraction form
   3,960.54/5,939.06 = 2,111.31/x
3. Step 3: Cross multiply
   3,960.54x = 5,939.06 × 2,111.31
4. Step 4: Simplify right side
   3,960.54x = 12,539,186.21
5. Step 5: Solve for x
   x = 12,539,186.21/3,960.54
6. Step 6: Final answer
   x = 3,166.03