Finding the Fourth Proportional to 30,721.43, 42,392.59 and 17,292.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,721.43 : 42,392.59 = 17,292.42 : x
2. Step 2: Convert to fraction form
   30,721.43/42,392.59 = 17,292.42/x
3. Step 3: Cross multiply
   30,721.43x = 42,392.59 × 17,292.42
4. Step 4: Simplify right side
   30,721.43x = 733,070,427.94
5. Step 5: Solve for x
   x = 733,070,427.94/30,721.43
6. Step 6: Final answer
   x = 23,861.86