Finding the Fourth Proportional to 2,171.49, 3,259.05 and 939.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.49 : 3,259.05 = 939.82 : x
2. Step 2: Convert to fraction form
   2,171.49/3,259.05 = 939.82/x
3. Step 3: Cross multiply
   2,171.49x = 3,259.05 × 939.82
4. Step 4: Simplify right side
   2,171.49x = 3,062,920.37
5. Step 5: Solve for x
   x = 3,062,920.37/2,171.49
6. Step 6: Final answer
   x = 1,410.52