Finding the Fourth Proportional to 1,393.72, 1,923.62 and 804.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.72 : 1,923.62 = 804.17 : x
2. Step 2: Convert to fraction form
   1,393.72/1,923.62 = 804.17/x
3. Step 3: Cross multiply
   1,393.72x = 1,923.62 × 804.17
4. Step 4: Simplify right side
   1,393.72x = 1,546,918.28
5. Step 5: Solve for x
   x = 1,546,918.28/1,393.72
6. Step 6: Final answer
   x = 1,109.92