Finding the Fourth Proportional to 1,383.52, 1,908.96 and 816.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.52 : 1,908.96 = 816.16 : x
2. Step 2: Convert to fraction form
   1,383.52/1,908.96 = 816.16/x
3. Step 3: Cross multiply
   1,383.52x = 1,908.96 × 816.16
4. Step 4: Simplify right side
   1,383.52x = 1,558,016.79
5. Step 5: Solve for x
   x = 1,558,016.79/1,383.52
6. Step 6: Final answer
   x = 1,126.13