Finding the Fourth Proportional to 30,517.57, 42,112.12 and 20,444.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,517.57 : 42,112.12 = 20,444.38 : x
2. Step 2: Convert to fraction form
   30,517.57/42,112.12 = 20,444.38/x
3. Step 3: Cross multiply
   30,517.57x = 42,112.12 × 20,444.38
4. Step 4: Simplify right side
   30,517.57x = 860,956,183.89
5. Step 5: Solve for x
   x = 860,956,183.89/30,517.57
6. Step 6: Final answer
   x = 28,211.82