Finding the Fourth Proportional to 1,196.59, 1,651.37 and 665.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.59 : 1,651.37 = 665.53 : x
2. Step 2: Convert to fraction form
   1,196.59/1,651.37 = 665.53/x
3. Step 3: Cross multiply
   1,196.59x = 1,651.37 × 665.53
4. Step 4: Simplify right side
   1,196.59x = 1,099,024.69
5. Step 5: Solve for x
   x = 1,099,024.69/1,196.59
6. Step 6: Final answer
   x = 918.47