Finding the Fourth Proportional to 2,090.82, 3,136.32 and 858.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.82 : 3,136.32 = 858.27 : x
2. Step 2: Convert to fraction form
   2,090.82/3,136.32 = 858.27/x
3. Step 3: Cross multiply
   2,090.82x = 3,136.32 × 858.27
4. Step 4: Simplify right side
   2,090.82x = 2,691,809.37
5. Step 5: Solve for x
   x = 2,691,809.37/2,090.82
6. Step 6: Final answer
   x = 1,287.44