Finding the Fourth Proportional to 1,393.57, 1,922.97 and 804.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.57 : 1,922.97 = 804.30 : x
2. Step 2: Convert to fraction form
   1,393.57/1,922.97 = 804.30/x
3. Step 3: Cross multiply
   1,393.57x = 1,922.97 × 804.30
4. Step 4: Simplify right side
   1,393.57x = 1,546,644.77
5. Step 5: Solve for x
   x = 1,546,644.77/1,393.57
6. Step 6: Final answer
   x = 1,109.84