Finding the Fourth Proportional to 3,448.14, 5,171.37 and 1,139.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,448.14 : 5,171.37 = 1,139.34 : x
2. Step 2: Convert to fraction form
   3,448.14/5,171.37 = 1,139.34/x
3. Step 3: Cross multiply
   3,448.14x = 5,171.37 × 1,139.34
4. Step 4: Simplify right side
   3,448.14x = 5,891,948.70
5. Step 5: Solve for x
   x = 5,891,948.70/3,448.14
6. Step 6: Final answer
   x = 1,708.73