Finding the Fourth Proportional to 2,106.27, 3,158.49 and 719.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.27 : 3,158.49 = 719.31 : x
2. Step 2: Convert to fraction form
   2,106.27/3,158.49 = 719.31/x
3. Step 3: Cross multiply
   2,106.27x = 3,158.49 × 719.31
4. Step 4: Simplify right side
   2,106.27x = 2,271,933.44
5. Step 5: Solve for x
   x = 2,271,933.44/2,106.27
6. Step 6: Final answer
   x = 1,078.65