Finding the Fourth Proportional to 30,721.68, 42,393.72 and 17,292.24

Step by Step Solution

1. Step 1: Write the proportion equation
   30,721.68 : 42,393.72 = 17,292.24 : x
2. Step 2: Convert to fraction form
   30,721.68/42,393.72 = 17,292.24/x
3. Step 3: Cross multiply
   30,721.68x = 42,393.72 × 17,292.24
4. Step 4: Simplify right side
   30,721.68x = 733,082,380.73
5. Step 5: Solve for x
   x = 733,082,380.73/30,721.68
6. Step 6: Final answer
   x = 23,862.05