Finding the Fourth Proportional to 1,198.58, 1,650.42 and 1,087.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.58 : 1,650.42 = 1,087.37 : x
2. Step 2: Convert to fraction form
   1,198.58/1,650.42 = 1,087.37/x
3. Step 3: Cross multiply
   1,198.58x = 1,650.42 × 1,087.37
4. Step 4: Simplify right side
   1,198.58x = 1,794,617.20
5. Step 5: Solve for x
   x = 1,794,617.20/1,198.58
6. Step 6: Final answer
   x = 1,497.29