Finding the Fourth Proportional to 20,651.43, 30,978.32 and 5,859.18

Step by Step Solution

1. Step 1: Write the proportion equation
   20,651.43 : 30,978.32 = 5,859.18 : x
2. Step 2: Convert to fraction form
   20,651.43/30,978.32 = 5,859.18/x
3. Step 3: Cross multiply
   20,651.43x = 30,978.32 × 5,859.18
4. Step 4: Simplify right side
   20,651.43x = 181,507,383.44
5. Step 5: Solve for x
   x = 181,507,383.44/20,651.43
6. Step 6: Final answer
   x = 8,789.10