Finding the Fourth Proportional to 1,383.14, 1,908.90 and 859.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.14 : 1,908.90 = 859.25 : x
2. Step 2: Convert to fraction form
   1,383.14/1,908.90 = 859.25/x
3. Step 3: Cross multiply
   1,383.14x = 1,908.90 × 859.25
4. Step 4: Simplify right side
   1,383.14x = 1,640,222.33
5. Step 5: Solve for x
   x = 1,640,222.33/1,383.14
6. Step 6: Final answer
   x = 1,185.87