Finding the Fourth Proportional to 1,196.58, 1,651.33 and 665.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.58 : 1,651.33 = 665.49 : x
2. Step 2: Convert to fraction form
   1,196.58/1,651.33 = 665.49/x
3. Step 3: Cross multiply
   1,196.58x = 1,651.33 × 665.49
4. Step 4: Simplify right side
   1,196.58x = 1,098,943.60
5. Step 5: Solve for x
   x = 1,098,943.60/1,196.58
6. Step 6: Final answer
   x = 918.40