Finding the Fourth Proportional to 1,198.68, 1,654.17 and 674.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.68 : 1,654.17 = 674.71 : x
2. Step 2: Convert to fraction form
   1,198.68/1,654.17 = 674.71/x
3. Step 3: Cross multiply
   1,198.68x = 1,654.17 × 674.71
4. Step 4: Simplify right side
   1,198.68x = 1,116,076.77
5. Step 5: Solve for x
   x = 1,116,076.77/1,198.68
6. Step 6: Final answer
   x = 931.09