Finding the Fourth Proportional to 2,172.52, 3,257.95 and 939.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.52 : 3,257.95 = 939.83 : x
2. Step 2: Convert to fraction form
   2,172.52/3,257.95 = 939.83/x
3. Step 3: Cross multiply
   2,172.52x = 3,257.95 × 939.83
4. Step 4: Simplify right side
   2,172.52x = 3,061,919.15
5. Step 5: Solve for x
   x = 3,061,919.15/2,172.52
6. Step 6: Final answer
   x = 1,409.39