Finding the Fourth Proportional to 4,086.99, 5,647.59 and 3,090.56

Step by Step Solution

1. Step 1: Write the proportion equation
   4,086.99 : 5,647.59 = 3,090.56 : x
2. Step 2: Convert to fraction form
   4,086.99/5,647.59 = 3,090.56/x
3. Step 3: Cross multiply
   4,086.99x = 5,647.59 × 3,090.56
4. Step 4: Simplify right side
   4,086.99x = 17,454,187.51
5. Step 5: Solve for x
   x = 17,454,187.51/4,086.99
6. Step 6: Final answer
   x = 4,270.67