Finding the Fourth Proportional to 1,436.49, 1,981.65 and 939.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.49 : 1,981.65 = 939.15 : x
2. Step 2: Convert to fraction form
   1,436.49/1,981.65 = 939.15/x
3. Step 3: Cross multiply
   1,436.49x = 1,981.65 × 939.15
4. Step 4: Simplify right side
   1,436.49x = 1,861,056.69
5. Step 5: Solve for x
   x = 1,861,056.69/1,436.49
6. Step 6: Final answer
   x = 1,295.56