Finding the Fourth Proportional to 1,383.68, 1,908.56 and 1,004.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.68 : 1,908.56 = 1,004.94 : x
2. Step 2: Convert to fraction form
   1,383.68/1,908.56 = 1,004.94/x
3. Step 3: Cross multiply
   1,383.68x = 1,908.56 × 1,004.94
4. Step 4: Simplify right side
   1,383.68x = 1,917,990.80
5. Step 5: Solve for x
   x = 1,917,990.80/1,383.68
6. Step 6: Final answer
   x = 1,386.15