Finding the Fourth Proportional to 1,083.67, 1,495.85 and 939.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.67 : 1,495.85 = 939.31 : x
2. Step 2: Convert to fraction form
   1,083.67/1,495.85 = 939.31/x
3. Step 3: Cross multiply
   1,083.67x = 1,495.85 × 939.31
4. Step 4: Simplify right side
   1,083.67x = 1,405,066.86
5. Step 5: Solve for x
   x = 1,405,066.86/1,083.67
6. Step 6: Final answer
   x = 1,296.58