Finding the Fourth Proportional to 5,394.31, 8,090.24 and 2,105.71

Step by Step Solution

1. Step 1: Write the proportion equation
   5,394.31 : 8,090.24 = 2,105.71 : x
2. Step 2: Convert to fraction form
   5,394.31/8,090.24 = 2,105.71/x
3. Step 3: Cross multiply
   5,394.31x = 8,090.24 × 2,105.71
4. Step 4: Simplify right side
   5,394.31x = 17,035,699.27
5. Step 5: Solve for x
   x = 17,035,699.27/5,394.31
6. Step 6: Final answer
   x = 3,158.09