Finding the Fourth Proportional to 1,198.86, 1,654.43 and 674.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.86 : 1,654.43 = 674.88 : x
2. Step 2: Convert to fraction form
   1,198.86/1,654.43 = 674.88/x
3. Step 3: Cross multiply
   1,198.86x = 1,654.43 × 674.88
4. Step 4: Simplify right side
   1,198.86x = 1,116,541.72
5. Step 5: Solve for x
   x = 1,116,541.72/1,198.86
6. Step 6: Final answer
   x = 931.34