Finding the Fourth Proportional to 2,020.90, 2,788.82 and 1,136.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.90 : 2,788.82 = 1,136.70 : x
2. Step 2: Convert to fraction form
   2,020.90/2,788.82 = 1,136.70/x
3. Step 3: Cross multiply
   2,020.90x = 2,788.82 × 1,136.70
4. Step 4: Simplify right side
   2,020.90x = 3,170,051.69
5. Step 5: Solve for x
   x = 3,170,051.69/2,020.90
6. Step 6: Final answer
   x = 1,568.63