Finding the Fourth Proportional to 1,293.27, 1,939.10 and 854.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.27 : 1,939.10 = 854.06 : x
2. Step 2: Convert to fraction form
   1,293.27/1,939.10 = 854.06/x
3. Step 3: Cross multiply
   1,293.27x = 1,939.10 × 854.06
4. Step 4: Simplify right side
   1,293.27x = 1,656,093.78
5. Step 5: Solve for x
   x = 1,656,093.78/1,293.27
6. Step 6: Final answer
   x = 1,280.55