Finding the Fourth Proportional to 1,073.82, 1,481.31 and 811.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.82 : 1,481.31 = 811.38 : x
2. Step 2: Convert to fraction form
   1,073.82/1,481.31 = 811.38/x
3. Step 3: Cross multiply
   1,073.82x = 1,481.31 × 811.38
4. Step 4: Simplify right side
   1,073.82x = 1,201,905.31
5. Step 5: Solve for x
   x = 1,201,905.31/1,073.82
6. Step 6: Final answer
   x = 1,119.28