Finding the Fourth Proportional to 1,198.98, 1,654.42 and 667.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.98 : 1,654.42 = 667.82 : x
2. Step 2: Convert to fraction form
   1,198.98/1,654.42 = 667.82/x
3. Step 3: Cross multiply
   1,198.98x = 1,654.42 × 667.82
4. Step 4: Simplify right side
   1,198.98x = 1,104,854.76
5. Step 5: Solve for x
   x = 1,104,854.76/1,198.98
6. Step 6: Final answer
   x = 921.50