Finding the Fourth Proportional to 3,980.37, 5,958.24 and 3,389.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.37 : 5,958.24 = 3,389.88 : x
2. Step 2: Convert to fraction form
   3,980.37/5,958.24 = 3,389.88/x
3. Step 3: Cross multiply
   3,980.37x = 5,958.24 × 3,389.88
4. Step 4: Simplify right side
   3,980.37x = 20,197,718.61
5. Step 5: Solve for x
   x = 20,197,718.61/3,980.37
6. Step 6: Final answer
   x = 5,074.33