Finding the Fourth Proportional to 1,007.46, 1,388.91 and 867.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.46 : 1,388.91 = 867.42 : x
2. Step 2: Convert to fraction form
   1,007.46/1,388.91 = 867.42/x
3. Step 3: Cross multiply
   1,007.46x = 1,388.91 × 867.42
4. Step 4: Simplify right side
   1,007.46x = 1,204,768.31
5. Step 5: Solve for x
   x = 1,204,768.31/1,007.46
6. Step 6: Final answer
   x = 1,195.85