Finding the Fourth Proportional to 1,393.40, 1,923.32 and 804.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.40 : 1,923.32 = 804.32 : x
2. Step 2: Convert to fraction form
   1,393.40/1,923.32 = 804.32/x
3. Step 3: Cross multiply
   1,393.40x = 1,923.32 × 804.32
4. Step 4: Simplify right side
   1,393.40x = 1,546,960.72
5. Step 5: Solve for x
   x = 1,546,960.72/1,393.40
6. Step 6: Final answer
   x = 1,110.21