Finding the Fourth Proportional to 3,131.33, 4,695.81 and 939.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.33 : 4,695.81 = 939.32 : x
2. Step 2: Convert to fraction form
   3,131.33/4,695.81 = 939.32/x
3. Step 3: Cross multiply
   3,131.33x = 4,695.81 × 939.32
4. Step 4: Simplify right side
   3,131.33x = 4,410,868.25
5. Step 5: Solve for x
   x = 4,410,868.25/3,131.33
6. Step 6: Final answer
   x = 1,408.62