Finding the Fourth Proportional to 1,198.80, 1,654.31 and 674.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.80 : 1,654.31 = 674.82 : x
2. Step 2: Convert to fraction form
   1,198.80/1,654.31 = 674.82/x
3. Step 3: Cross multiply
   1,198.80x = 1,654.31 × 674.82
4. Step 4: Simplify right side
   1,198.80x = 1,116,363.16
5. Step 5: Solve for x
   x = 1,116,363.16/1,198.80
6. Step 6: Final answer
   x = 931.23