Finding the Fourth Proportional to 1,393.60, 1,922.83 and 804.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.60 : 1,922.83 = 804.13 : x
2. Step 2: Convert to fraction form
   1,393.60/1,922.83 = 804.13/x
3. Step 3: Cross multiply
   1,393.60x = 1,922.83 × 804.13
4. Step 4: Simplify right side
   1,393.60x = 1,546,209.29
5. Step 5: Solve for x
   x = 1,546,209.29/1,393.60
6. Step 6: Final answer
   x = 1,109.51