Finding the Fourth Proportional to 1,393.45, 1,923.04 and 804.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.45 : 1,923.04 = 804.18 : x
2. Step 2: Convert to fraction form
   1,393.45/1,923.04 = 804.18/x
3. Step 3: Cross multiply
   1,393.45x = 1,923.04 × 804.18
4. Step 4: Simplify right side
   1,393.45x = 1,546,467.71
5. Step 5: Solve for x
   x = 1,546,467.71/1,393.45
6. Step 6: Final answer
   x = 1,109.81