Finding the Fourth Proportional to 1,353.21, 1,867.15 and 822.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.21 : 1,867.15 = 822.38 : x
2. Step 2: Convert to fraction form
   1,353.21/1,867.15 = 822.38/x
3. Step 3: Cross multiply
   1,353.21x = 1,867.15 × 822.38
4. Step 4: Simplify right side
   1,353.21x = 1,535,498.51
5. Step 5: Solve for x
   x = 1,535,498.51/1,353.21
6. Step 6: Final answer
   x = 1,134.71