Finding the Fourth Proportional to 3,139.20, 4,705.92 and 1,164.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.20 : 4,705.92 = 1,164.33 : x
2. Step 2: Convert to fraction form
   3,139.20/4,705.92 = 1,164.33/x
3. Step 3: Cross multiply
   3,139.20x = 4,705.92 × 1,164.33
4. Step 4: Simplify right side
   3,139.20x = 5,479,243.83
5. Step 5: Solve for x
   x = 5,479,243.83/3,139.20
6. Step 6: Final answer
   x = 1,745.43