Finding the Fourth Proportional to 1,393.43, 1,922.90 and 804.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.43 : 1,922.90 = 804.06 : x
2. Step 2: Convert to fraction form
   1,393.43/1,922.90 = 804.06/x
3. Step 3: Cross multiply
   1,393.43x = 1,922.90 × 804.06
4. Step 4: Simplify right side
   1,393.43x = 1,546,122.95
5. Step 5: Solve for x
   x = 1,546,122.95/1,393.43
6. Step 6: Final answer
   x = 1,109.58