Finding the Fourth Proportional to 16,958.43, 23,400.72 and 9,404.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,958.43 : 23,400.72 = 9,404.55 : x
2. Step 2: Convert to fraction form
   16,958.43/23,400.72 = 9,404.55/x
3. Step 3: Cross multiply
   16,958.43x = 23,400.72 × 9,404.55
4. Step 4: Simplify right side
   16,958.43x = 220,073,241.28
5. Step 5: Solve for x
   x = 220,073,241.28/16,958.43
6. Step 6: Final answer
   x = 12,977.22