Finding the Fourth Proportional to 1,393.54, 1,922.01 and 1,020.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.54 : 1,922.01 = 1,020.38 : x
2. Step 2: Convert to fraction form
   1,393.54/1,922.01 = 1,020.38/x
3. Step 3: Cross multiply
   1,393.54x = 1,922.01 × 1,020.38
4. Step 4: Simplify right side
   1,393.54x = 1,961,187.92
5. Step 5: Solve for x
   x = 1,961,187.92/1,393.54
6. Step 6: Final answer
   x = 1,407.34