Finding the Fourth Proportional to 1,443.24, 1,991.52 and 822.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.24 : 1,991.52 = 822.24 : x
2. Step 2: Convert to fraction form
   1,443.24/1,991.52 = 822.24/x
3. Step 3: Cross multiply
   1,443.24x = 1,991.52 × 822.24
4. Step 4: Simplify right side
   1,443.24x = 1,637,507.40
5. Step 5: Solve for x
   x = 1,637,507.40/1,443.24
6. Step 6: Final answer
   x = 1,134.61