Finding the Fourth Proportional to 1,959.72, 2,940.34 and 863.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,959.72 : 2,940.34 = 863.31 : x
2. Step 2: Convert to fraction form
   1,959.72/2,940.34 = 863.31/x
3. Step 3: Cross multiply
   1,959.72x = 2,940.34 × 863.31
4. Step 4: Simplify right side
   1,959.72x = 2,538,424.93
5. Step 5: Solve for x
   x = 2,538,424.93/1,959.72
6. Step 6: Final answer
   x = 1,295.30