Finding the Fourth Proportional to 1,136.10, 1,563.39 and 1,005.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.10 : 1,563.39 = 1,005.42 : x
2. Step 2: Convert to fraction form
   1,136.10/1,563.39 = 1,005.42/x
3. Step 3: Cross multiply
   1,136.10x = 1,563.39 × 1,005.42
4. Step 4: Simplify right side
   1,136.10x = 1,571,863.57
5. Step 5: Solve for x
   x = 1,571,863.57/1,136.10
6. Step 6: Final answer
   x = 1,383.56