Finding the Fourth Proportional to 1,198.59, 1,653.94 and 667.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.59 : 1,653.94 = 667.37 : x
2. Step 2: Convert to fraction form
   1,198.59/1,653.94 = 667.37/x
3. Step 3: Cross multiply
   1,198.59x = 1,653.94 × 667.37
4. Step 4: Simplify right side
   1,198.59x = 1,103,794.91
5. Step 5: Solve for x
   x = 1,103,794.91/1,198.59
6. Step 6: Final answer
   x = 920.91