Finding the Fourth Proportional to 1,196.34, 1,650.90 and 665.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.34 : 1,650.90 = 665.22 : x
2. Step 2: Convert to fraction form
   1,196.34/1,650.90 = 665.22/x
3. Step 3: Cross multiply
   1,196.34x = 1,650.90 × 665.22
4. Step 4: Simplify right side
   1,196.34x = 1,098,211.70
5. Step 5: Solve for x
   x = 1,098,211.70/1,196.34
6. Step 6: Final answer
   x = 917.98