Finding the Fourth Proportional to 1,196.06, 1,650.57 and 664.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.06 : 1,650.57 = 664.95 : x
2. Step 2: Convert to fraction form
   1,196.06/1,650.57 = 664.95/x
3. Step 3: Cross multiply
   1,196.06x = 1,650.57 × 664.95
4. Step 4: Simplify right side
   1,196.06x = 1,097,534.94
5. Step 5: Solve for x
   x = 1,097,534.94/1,196.06
6. Step 6: Final answer
   x = 917.63