Finding the Fourth Proportional to 16,942.87, 23,380.85 and 9,388.91

Step by Step Solution

1. Step 1: Write the proportion equation
   16,942.87 : 23,380.85 = 9,388.91 : x
2. Step 2: Convert to fraction form
   16,942.87/23,380.85 = 9,388.91/x
3. Step 3: Cross multiply
   16,942.87x = 23,380.85 × 9,388.91
4. Step 4: Simplify right side
   16,942.87x = 219,520,778.30
5. Step 5: Solve for x
   x = 219,520,778.30/16,942.87
6. Step 6: Final answer
   x = 12,956.53