Finding the Fourth Proportional to 1,393.74, 1,923.57 and 804.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.74 : 1,923.57 = 804.24 : x
2. Step 2: Convert to fraction form
   1,393.74/1,923.57 = 804.24/x
3. Step 3: Cross multiply
   1,393.74x = 1,923.57 × 804.24
4. Step 4: Simplify right side
   1,393.74x = 1,547,011.94
5. Step 5: Solve for x
   x = 1,547,011.94/1,393.74
6. Step 6: Final answer
   x = 1,109.97