Finding the Fourth Proportional to 16,959.39, 23,403.83 and 9,405.71

Step by Step Solution

1. Step 1: Write the proportion equation
   16,959.39 : 23,403.83 = 9,405.71 : x
2. Step 2: Convert to fraction form
   16,959.39/23,403.83 = 9,405.71/x
3. Step 3: Cross multiply
   16,959.39x = 23,403.83 × 9,405.71
4. Step 4: Simplify right side
   16,959.39x = 220,129,473.82
5. Step 5: Solve for x
   x = 220,129,473.82/16,959.39
6. Step 6: Final answer
   x = 12,979.80