Finding the Fourth Proportional to 16,958.53, 23,402.84 and 9,405.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,958.53 : 23,402.84 = 9,405.56 : x
2. Step 2: Convert to fraction form
   16,958.53/23,402.84 = 9,405.56/x
3. Step 3: Cross multiply
   16,958.53x = 23,402.84 × 9,405.56
4. Step 4: Simplify right side
   16,958.53x = 220,116,827.27
5. Step 5: Solve for x
   x = 220,116,827.27/16,958.53
6. Step 6: Final answer
   x = 12,979.71