Finding the Fourth Proportional to 1,397.37, 1,923.54 and 1,208.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.37 : 1,923.54 = 1,208.23 : x
2. Step 2: Convert to fraction form
   1,397.37/1,923.54 = 1,208.23/x
3. Step 3: Cross multiply
   1,397.37x = 1,923.54 × 1,208.23
4. Step 4: Simplify right side
   1,397.37x = 2,324,078.73
5. Step 5: Solve for x
   x = 2,324,078.73/1,397.37
6. Step 6: Final answer
   x = 1,663.18