Finding the Fourth Proportional to 1,196.42, 1,651.06 and 665.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.42 : 1,651.06 = 665.30 : x
2. Step 2: Convert to fraction form
   1,196.42/1,651.06 = 665.30/x
3. Step 3: Cross multiply
   1,196.42x = 1,651.06 × 665.30
4. Step 4: Simplify right side
   1,196.42x = 1,098,450.22
5. Step 5: Solve for x
   x = 1,098,450.22/1,196.42
6. Step 6: Final answer
   x = 918.11