Finding the Fourth Proportional to 30,456.70, 42,034.10 and 17,028.74

Step by Step Solution

1. Step 1: Write the proportion equation
   30,456.70 : 42,034.10 = 17,028.74 : x
2. Step 2: Convert to fraction form
   30,456.70/42,034.10 = 17,028.74/x
3. Step 3: Cross multiply
   30,456.70x = 42,034.10 × 17,028.74
4. Step 4: Simplify right side
   30,456.70x = 715,787,907.69
5. Step 5: Solve for x
   x = 715,787,907.69/30,456.70
6. Step 6: Final answer
   x = 23,501.82