Finding the Fourth Proportional to 1,422.99, 1,963.12 and 863.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.99 : 1,963.12 = 863.25 : x
2. Step 2: Convert to fraction form
   1,422.99/1,963.12 = 863.25/x
3. Step 3: Cross multiply
   1,422.99x = 1,963.12 × 863.25
4. Step 4: Simplify right side
   1,422.99x = 1,694,649.21
5. Step 5: Solve for x
   x = 1,694,649.21/1,422.99
6. Step 6: Final answer
   x = 1,190.91