Finding the Fourth Proportional to 1,320.81, 1,819.89 and 1,083.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.81 : 1,819.89 = 1,083.96 : x
2. Step 2: Convert to fraction form
   1,320.81/1,819.89 = 1,083.96/x
3. Step 3: Cross multiply
   1,320.81x = 1,819.89 × 1,083.96
4. Step 4: Simplify right side
   1,320.81x = 1,972,687.96
5. Step 5: Solve for x
   x = 1,972,687.96/1,320.81
6. Step 6: Final answer
   x = 1,493.54