Finding the Fourth Proportional to 30,910.58, 42,644.52 and 20,168.09

Step by Step Solution

1. Step 1: Write the proportion equation
   30,910.58 : 42,644.52 = 20,168.09 : x
2. Step 2: Convert to fraction form
   30,910.58/42,644.52 = 20,168.09/x
3. Step 3: Cross multiply
   30,910.58x = 42,644.52 × 20,168.09
4. Step 4: Simplify right side
   30,910.58x = 860,058,304.14
5. Step 5: Solve for x
   x = 860,058,304.14/30,910.58
6. Step 6: Final answer
   x = 27,824.08