Finding the Fourth Proportional to 16,216.42, 22,375.78 and 9,142.84

Step by Step Solution

1. Step 1: Write the proportion equation
   16,216.42 : 22,375.78 = 9,142.84 : x
2. Step 2: Convert to fraction form
   16,216.42/22,375.78 = 9,142.84/x
3. Step 3: Cross multiply
   16,216.42x = 22,375.78 × 9,142.84
4. Step 4: Simplify right side
   16,216.42x = 204,578,176.42
5. Step 5: Solve for x
   x = 204,578,176.42/16,216.42
6. Step 6: Final answer
   x = 12,615.50