Finding the Fourth Proportional to 20,651.37, 30,978.23 and 5,859.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,651.37 : 30,978.23 = 5,859.12 : x
2. Step 2: Convert to fraction form
   20,651.37/30,978.23 = 5,859.12/x
3. Step 3: Cross multiply
   20,651.37x = 30,978.23 × 5,859.12
4. Step 4: Simplify right side
   20,651.37x = 181,505,137.66
5. Step 5: Solve for x
   x = 181,505,137.66/20,651.37
6. Step 6: Final answer
   x = 8,789.01