Finding the Fourth Proportional to 1,422.91, 1,963.78 and 863.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.91 : 1,963.78 = 863.52 : x
2. Step 2: Convert to fraction form
   1,422.91/1,963.78 = 863.52/x
3. Step 3: Cross multiply
   1,422.91x = 1,963.78 × 863.52
4. Step 4: Simplify right side
   1,422.91x = 1,695,753.78
5. Step 5: Solve for x
   x = 1,695,753.78/1,422.91
6. Step 6: Final answer
   x = 1,191.75