Finding the Fourth Proportional to 1,383.20, 1,908.79 and 793.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.20 : 1,908.79 = 793.72 : x
2. Step 2: Convert to fraction form
   1,383.20/1,908.79 = 793.72/x
3. Step 3: Cross multiply
   1,383.20x = 1,908.79 × 793.72
4. Step 4: Simplify right side
   1,383.20x = 1,515,044.80
5. Step 5: Solve for x
   x = 1,515,044.80/1,383.20
6. Step 6: Final answer
   x = 1,095.32