Finding the Fourth Proportional to 1,383.05, 1,908.18 and 851.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.05 : 1,908.18 = 851.38 : x
2. Step 2: Convert to fraction form
   1,383.05/1,908.18 = 851.38/x
3. Step 3: Cross multiply
   1,383.05x = 1,908.18 × 851.38
4. Step 4: Simplify right side
   1,383.05x = 1,624,586.29
5. Step 5: Solve for x
   x = 1,624,586.29/1,383.05
6. Step 6: Final answer
   x = 1,174.64