Finding the Fourth Proportional to 1,436.38, 1,981.74 and 939.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.38 : 1,981.74 = 939.58 : x
2. Step 2: Convert to fraction form
   1,436.38/1,981.74 = 939.58/x
3. Step 3: Cross multiply
   1,436.38x = 1,981.74 × 939.58
4. Step 4: Simplify right side
   1,436.38x = 1,862,003.27
5. Step 5: Solve for x
   x = 1,862,003.27/1,436.38
6. Step 6: Final answer
   x = 1,296.32