Finding the Fourth Proportional to 30,578.30, 42,200.08 and 17,150.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,578.30 : 42,200.08 = 17,150.42 : x
2. Step 2: Convert to fraction form
   30,578.30/42,200.08 = 17,150.42/x
3. Step 3: Cross multiply
   30,578.30x = 42,200.08 × 17,150.42
4. Step 4: Simplify right side
   30,578.30x = 723,749,096.03
5. Step 5: Solve for x
   x = 723,749,096.03/30,578.30
6. Step 6: Final answer
   x = 23,668.72