Finding the Fourth Proportional to 16,959.21, 23,405.15 and 9,407.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,959.21 : 23,405.15 = 9,407.98 : x
2. Step 2: Convert to fraction form
   16,959.21/23,405.15 = 9,407.98/x
3. Step 3: Cross multiply
   16,959.21x = 23,405.15 × 9,407.98
4. Step 4: Simplify right side
   16,959.21x = 220,195,086.58
5. Step 5: Solve for x
   x = 220,195,086.58/16,959.21
6. Step 6: Final answer
   x = 12,983.80