Finding the Fourth Proportional to 1,393.98, 1,923.71 and 804.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.98 : 1,923.71 = 804.48 : x
2. Step 2: Convert to fraction form
   1,393.98/1,923.71 = 804.48/x
3. Step 3: Cross multiply
   1,393.98x = 1,923.71 × 804.48
4. Step 4: Simplify right side
   1,393.98x = 1,547,582.20
5. Step 5: Solve for x
   x = 1,547,582.20/1,393.98
6. Step 6: Final answer
   x = 1,110.19