Finding the Fourth Proportional to 16,942.96, 23,380.71 and 9,389.61

Step by Step Solution

1. Step 1: Write the proportion equation
   16,942.96 : 23,380.71 = 9,389.61 : x
2. Step 2: Convert to fraction form
   16,942.96/23,380.71 = 9,389.61/x
3. Step 3: Cross multiply
   16,942.96x = 23,380.71 × 9,389.61
4. Step 4: Simplify right side
   16,942.96x = 219,535,748.42
5. Step 5: Solve for x
   x = 219,535,748.42/16,942.96
6. Step 6: Final answer
   x = 12,957.34