Finding the Fourth Proportional to 1,315.43, 1,815.42 and 983.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.43 : 1,815.42 = 983.27 : x
2. Step 2: Convert to fraction form
   1,315.43/1,815.42 = 983.27/x
3. Step 3: Cross multiply
   1,315.43x = 1,815.42 × 983.27
4. Step 4: Simplify right side
   1,315.43x = 1,785,048.02
5. Step 5: Solve for x
   x = 1,785,048.02/1,315.43
6. Step 6: Final answer
   x = 1,357.01