Finding the Fourth Proportional to 30,570.30, 42,189.03 and 17,142.41

Step by Step Solution

1. Step 1: Write the proportion equation
   30,570.30 : 42,189.03 = 17,142.41 : x
2. Step 2: Convert to fraction form
   30,570.30/42,189.03 = 17,142.41/x
3. Step 3: Cross multiply
   30,570.30x = 42,189.03 × 17,142.41
4. Step 4: Simplify right side
   30,570.30x = 723,221,755.23
5. Step 5: Solve for x
   x = 723,221,755.23/30,570.30
6. Step 6: Final answer
   x = 23,657.66