Finding the Fourth Proportional to 2,020.59, 2,787.72 and 1,136.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.59 : 2,787.72 = 1,136.20 : x
2. Step 2: Convert to fraction form
   2,020.59/2,787.72 = 1,136.20/x
3. Step 3: Cross multiply
   2,020.59x = 2,787.72 × 1,136.20
4. Step 4: Simplify right side
   2,020.59x = 3,167,407.46
5. Step 5: Solve for x
   x = 3,167,407.46/2,020.59
6. Step 6: Final answer
   x = 1,567.57