Finding the Fourth Proportional to 1,196.51, 1,651.12 and 665.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.51 : 1,651.12 = 665.43 : x
2. Step 2: Convert to fraction form
   1,196.51/1,651.12 = 665.43/x
3. Step 3: Cross multiply
   1,196.51x = 1,651.12 × 665.43
4. Step 4: Simplify right side
   1,196.51x = 1,098,704.78
5. Step 5: Solve for x
   x = 1,098,704.78/1,196.51
6. Step 6: Final answer
   x = 918.26