Finding the Fourth Proportional to 2,020.91, 2,789.11 and 1,136.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.91 : 2,789.11 = 1,136.88 : x
2. Step 2: Convert to fraction form
   2,020.91/2,789.11 = 1,136.88/x
3. Step 3: Cross multiply
   2,020.91x = 2,789.11 × 1,136.88
4. Step 4: Simplify right side
   2,020.91x = 3,170,870.56
5. Step 5: Solve for x
   x = 3,170,870.56/2,020.91
6. Step 6: Final answer
   x = 1,569.03