Finding the Fourth Proportional to 1,393.94, 1,923.50 and 804.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.94 : 1,923.50 = 804.34 : x
2. Step 2: Convert to fraction form
   1,393.94/1,923.50 = 804.34/x
3. Step 3: Cross multiply
   1,393.94x = 1,923.50 × 804.34
4. Step 4: Simplify right side
   1,393.94x = 1,547,147.99
5. Step 5: Solve for x
   x = 1,547,147.99/1,393.94
6. Step 6: Final answer
   x = 1,109.91