Finding the Fourth Proportional to 1,002.82, 1,383.36 and 629.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.82 : 1,383.36 = 629.09 : x
2. Step 2: Convert to fraction form
   1,002.82/1,383.36 = 629.09/x
3. Step 3: Cross multiply
   1,002.82x = 1,383.36 × 629.09
4. Step 4: Simplify right side
   1,002.82x = 870,257.94
5. Step 5: Solve for x
   x = 870,257.94/1,002.82
6. Step 6: Final answer
   x = 867.81