Finding the Fourth Proportional to 1,198.41, 1,653.81 and 667.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.41 : 1,653.81 = 667.25 : x
2. Step 2: Convert to fraction form
   1,198.41/1,653.81 = 667.25/x
3. Step 3: Cross multiply
   1,198.41x = 1,653.81 × 667.25
4. Step 4: Simplify right side
   1,198.41x = 1,103,500.15
5. Step 5: Solve for x
   x = 1,103,500.15/1,198.41
6. Step 6: Final answer
   x = 920.81