Finding the Fourth Proportional to 1,103.25, 1,650.78 and 664.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.25 : 1,650.78 = 664.71 : x
2. Step 2: Convert to fraction form
   1,103.25/1,650.78 = 664.71/x
3. Step 3: Cross multiply
   1,103.25x = 1,650.78 × 664.71
4. Step 4: Simplify right side
   1,103.25x = 1,097,289.97
5. Step 5: Solve for x
   x = 1,097,289.97/1,103.25
6. Step 6: Final answer
   x = 994.60