Finding the Fourth Proportional to 1,081.79, 1,493.46 and 1,007.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.79 : 1,493.46 = 1,007.97 : x
2. Step 2: Convert to fraction form
   1,081.79/1,493.46 = 1,007.97/x
3. Step 3: Cross multiply
   1,081.79x = 1,493.46 × 1,007.97
4. Step 4: Simplify right side
   1,081.79x = 1,505,362.88
5. Step 5: Solve for x
   x = 1,505,362.88/1,081.79
6. Step 6: Final answer
   x = 1,391.55