Finding the Fourth Proportional to 3,711.89, 5,571.31 and 1,958.19

Step by Step Solution

1. Step 1: Write the proportion equation
   3,711.89 : 5,571.31 = 1,958.19 : x
2. Step 2: Convert to fraction form
   3,711.89/5,571.31 = 1,958.19/x
3. Step 3: Cross multiply
   3,711.89x = 5,571.31 × 1,958.19
4. Step 4: Simplify right side
   3,711.89x = 10,909,683.53
5. Step 5: Solve for x
   x = 10,909,683.53/3,711.89
6. Step 6: Final answer
   x = 2,939.12