Finding the Fourth Proportional to 16,956.58, 23,401.50 and 9,405.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,956.58 : 23,401.50 = 9,405.28 : x
2. Step 2: Convert to fraction form
   16,956.58/23,401.50 = 9,405.28/x
3. Step 3: Cross multiply
   16,956.58x = 23,401.50 × 9,405.28
4. Step 4: Simplify right side
   16,956.58x = 220,097,659.92
5. Step 5: Solve for x
   x = 220,097,659.92/16,956.58
6. Step 6: Final answer
   x = 12,980.07