Finding the Fourth Proportional to 1,436.28, 1,982.72 and 938.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.28 : 1,982.72 = 938.94 : x
2. Step 2: Convert to fraction form
   1,436.28/1,982.72 = 938.94/x
3. Step 3: Cross multiply
   1,436.28x = 1,982.72 × 938.94
4. Step 4: Simplify right side
   1,436.28x = 1,861,655.12
5. Step 5: Solve for x
   x = 1,861,655.12/1,436.28
6. Step 6: Final answer
   x = 1,296.16