Finding the Fourth Proportional to 1,382.92, 1,908.83 and 1,105.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.92 : 1,908.83 = 1,105.09 : x
2. Step 2: Convert to fraction form
   1,382.92/1,908.83 = 1,105.09/x
3. Step 3: Cross multiply
   1,382.92x = 1,908.83 × 1,105.09
4. Step 4: Simplify right side
   1,382.92x = 2,109,428.94
5. Step 5: Solve for x
   x = 2,109,428.94/1,382.92
6. Step 6: Final answer
   x = 1,525.34