Finding the Fourth Proportional to 1,198.31, 1,653.82 and 867.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.31 : 1,653.82 = 867.83 : x
2. Step 2: Convert to fraction form
   1,198.31/1,653.82 = 867.83/x
3. Step 3: Cross multiply
   1,198.31x = 1,653.82 × 867.83
4. Step 4: Simplify right side
   1,198.31x = 1,435,224.17
5. Step 5: Solve for x
   x = 1,435,224.17/1,198.31
6. Step 6: Final answer
   x = 1,197.71