Finding the Fourth Proportional to 2,021.21, 2,789.03 and 1,136.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.21 : 2,789.03 = 1,136.96 : x
2. Step 2: Convert to fraction form
   2,021.21/2,789.03 = 1,136.96/x
3. Step 3: Cross multiply
   2,021.21x = 2,789.03 × 1,136.96
4. Step 4: Simplify right side
   2,021.21x = 3,171,015.55
5. Step 5: Solve for x
   x = 3,171,015.55/2,021.21
6. Step 6: Final answer
   x = 1,568.87