Finding the Fourth Proportional to 1,403.09, 1,936.22 and 805.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.09 : 1,936.22 = 805.68 : x
2. Step 2: Convert to fraction form
   1,403.09/1,936.22 = 805.68/x
3. Step 3: Cross multiply
   1,403.09x = 1,936.22 × 805.68
4. Step 4: Simplify right side
   1,403.09x = 1,559,974.23
5. Step 5: Solve for x
   x = 1,559,974.23/1,403.09
6. Step 6: Final answer
   x = 1,111.81