Finding the Fourth Proportional to 3,971.98, 5,957.18 and 1,339.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971.98 : 5,957.18 = 1,339.23 : x
2. Step 2: Convert to fraction form
   3,971.98/5,957.18 = 1,339.23/x
3. Step 3: Cross multiply
   3,971.98x = 5,957.18 × 1,339.23
4. Step 4: Simplify right side
   3,971.98x = 7,978,004.39
5. Step 5: Solve for x
   x = 7,978,004.39/3,971.98
6. Step 6: Final answer
   x = 2,008.57