Finding the Fourth Proportional to 30,215.72, 41,697.42 and 16,787

Step by Step Solution

1. Step 1: Write the proportion equation
   30,215.72 : 41,697.42 = 16,787 : x
2. Step 2: Convert to fraction form
   30,215.72/41,697.42 = 16,787/x
3. Step 3: Cross multiply
   30,215.72x = 41,697.42 × 16,787
4. Step 4: Simplify right side
   30,215.72x = 699,974,589.54
5. Step 5: Solve for x
   x = 699,974,589.54/30,215.72
6. Step 6: Final answer
   x = 23,165.91