Finding the Fourth Proportional to 1,369.81, 2,055.22 and 822.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.81 : 2,055.22 = 822.38 : x
2. Step 2: Convert to fraction form
   1,369.81/2,055.22 = 822.38/x
3. Step 3: Cross multiply
   1,369.81x = 2,055.22 × 822.38
4. Step 4: Simplify right side
   1,369.81x = 1,690,171.82
5. Step 5: Solve for x
   x = 1,690,171.82/1,369.81
6. Step 6: Final answer
   x = 1,233.87