Finding the Fourth Proportional to 31,879.72, 43,989.72 and 17,729.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,879.72 : 43,989.72 = 17,729.84 : x
2. Step 2: Convert to fraction form
   31,879.72/43,989.72 = 17,729.84/x
3. Step 3: Cross multiply
   31,879.72x = 43,989.72 × 17,729.84
4. Step 4: Simplify right side
   31,879.72x = 779,930,697.24
5. Step 5: Solve for x
   x = 779,930,697.24/31,879.72
6. Step 6: Final answer
   x = 24,464.79