Finding the Fourth Proportional to 30,578, 42,198.28 and 17,330

Step by Step Solution

1. Step 1: Write the proportion equation
   30,578 : 42,198.28 = 17,330 : x
2. Step 2: Convert to fraction form
   30,578/42,198.28 = 17,330/x
3. Step 3: Cross multiply
   30,578x = 42,198.28 × 17,330
4. Step 4: Simplify right side
   30,578x = 731,296,192.40
5. Step 5: Solve for x
   x = 731,296,192.40/30,578
6. Step 6: Final answer
   x = 23,915.76