Finding the Fourth Proportional to 30,570.28, 42,190.35 and 17,142.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,570.28 : 42,190.35 = 17,142.82 : x
2. Step 2: Convert to fraction form
   30,570.28/42,190.35 = 17,142.82/x
3. Step 3: Cross multiply
   30,570.28x = 42,190.35 × 17,142.82
4. Step 4: Simplify right side
   30,570.28x = 723,261,575.79
5. Step 5: Solve for x
   x = 723,261,575.79/30,570.28
6. Step 6: Final answer
   x = 23,658.98