Finding the Fourth Proportional to 1,196.18, 1,650.73 and 665.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.18 : 1,650.73 = 665.11 : x
2. Step 2: Convert to fraction form
   1,196.18/1,650.73 = 665.11/x
3. Step 3: Cross multiply
   1,196.18x = 1,650.73 × 665.11
4. Step 4: Simplify right side
   1,196.18x = 1,097,913.46
5. Step 5: Solve for x
   x = 1,097,913.46/1,196.18
6. Step 6: Final answer
   x = 917.85