Finding the Fourth Proportional to 16,958.94, 23,403.34 and 9,406.43

Step by Step Solution

1. Step 1: Write the proportion equation
   16,958.94 : 23,403.34 = 9,406.43 : x
2. Step 2: Convert to fraction form
   16,958.94/23,403.34 = 9,406.43/x
3. Step 3: Cross multiply
   16,958.94x = 23,403.34 × 9,406.43
4. Step 4: Simplify right side
   16,958.94x = 220,141,715.43
5. Step 5: Solve for x
   x = 220,141,715.43/16,958.94
6. Step 6: Final answer
   x = 12,980.87