Finding the Fourth Proportional to 1,333.24, 1,839.72 and 939.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.24 : 1,839.72 = 939.58 : x
2. Step 2: Convert to fraction form
   1,333.24/1,839.72 = 939.58/x
3. Step 3: Cross multiply
   1,333.24x = 1,839.72 × 939.58
4. Step 4: Simplify right side
   1,333.24x = 1,728,563.02
5. Step 5: Solve for x
   x = 1,728,563.02/1,333.24
6. Step 6: Final answer
   x = 1,296.51