Finding the Fourth Proportional to 1,608.38, 2,411.38 and 1,087.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.38 : 2,411.38 = 1,087.09 : x
2. Step 2: Convert to fraction form
   1,608.38/2,411.38 = 1,087.09/x
3. Step 3: Cross multiply
   1,608.38x = 2,411.38 × 1,087.09
4. Step 4: Simplify right side
   1,608.38x = 2,621,382.41
5. Step 5: Solve for x
   x = 2,621,382.41/1,608.38
6. Step 6: Final answer
   x = 1,629.83