Finding the Fourth Proportional to 31,021.56, 42,809.24 and 17,223.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,021.56 : 42,809.24 = 17,223.42 : x
2. Step 2: Convert to fraction form
   31,021.56/42,809.24 = 17,223.42/x
3. Step 3: Cross multiply
   31,021.56x = 42,809.24 × 17,223.42
4. Step 4: Simplify right side
   31,021.56x = 737,321,520.40
5. Step 5: Solve for x
   x = 737,321,520.40/31,021.56
6. Step 6: Final answer
   x = 23,768.03