Finding the Fourth Proportional to 3,119.57, 4,679.89 and 1,271.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,119.57 : 4,679.89 = 1,271.96 : x
2. Step 2: Convert to fraction form
   3,119.57/4,679.89 = 1,271.96/x
3. Step 3: Cross multiply
   3,119.57x = 4,679.89 × 1,271.96
4. Step 4: Simplify right side
   3,119.57x = 5,952,632.88
5. Step 5: Solve for x
   x = 5,952,632.88/3,119.57
6. Step 6: Final answer
   x = 1,908.16