Finding the Fourth Proportional to 16,478.24, 22,741.58 and 9,405.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,478.24 : 22,741.58 = 9,405.72 : x
2. Step 2: Convert to fraction form
   16,478.24/22,741.58 = 9,405.72/x
3. Step 3: Cross multiply
   16,478.24x = 22,741.58 × 9,405.72
4. Step 4: Simplify right side
   16,478.24x = 213,900,957.35
5. Step 5: Solve for x
   x = 213,900,957.35/16,478.24
6. Step 6: Final answer
   x = 12,980.82