Finding the Fourth Proportional to 1,436.08, 1,981.49 and 939.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.08 : 1,981.49 = 939.45 : x
2. Step 2: Convert to fraction form
   1,436.08/1,981.49 = 939.45/x
3. Step 3: Cross multiply
   1,436.08x = 1,981.49 × 939.45
4. Step 4: Simplify right side
   1,436.08x = 1,861,510.78
5. Step 5: Solve for x
   x = 1,861,510.78/1,436.08
6. Step 6: Final answer
   x = 1,296.24