Finding the Fourth Proportional to 1,196.71, 1,651.45 and 665.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.71 : 1,651.45 = 665.62 : x
2. Step 2: Convert to fraction form
   1,196.71/1,651.45 = 665.62/x
3. Step 3: Cross multiply
   1,196.71x = 1,651.45 × 665.62
4. Step 4: Simplify right side
   1,196.71x = 1,099,234.82
5. Step 5: Solve for x
   x = 1,099,234.82/1,196.71
6. Step 6: Final answer
   x = 918.55