Finding the Fourth Proportional to 2,020.69, 2,788.56 and 1,136.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.69 : 2,788.56 = 1,136.48 : x
2. Step 2: Convert to fraction form
   2,020.69/2,788.56 = 1,136.48/x
3. Step 3: Cross multiply
   2,020.69x = 2,788.56 × 1,136.48
4. Step 4: Simplify right side
   2,020.69x = 3,169,128.73
5. Step 5: Solve for x
   x = 3,169,128.73/2,020.69
6. Step 6: Final answer
   x = 1,568.34