Finding the Fourth Proportional to 16,216.79, 22,378.82 and 9,143.46

Step by Step Solution

1. Step 1: Write the proportion equation
   16,216.79 : 22,378.82 = 9,143.46 : x
2. Step 2: Convert to fraction form
   16,216.79/22,378.82 = 9,143.46/x
3. Step 3: Cross multiply
   16,216.79x = 22,378.82 × 9,143.46
4. Step 4: Simplify right side
   16,216.79x = 204,619,799.80
5. Step 5: Solve for x
   x = 204,619,799.80/16,216.79
6. Step 6: Final answer
   x = 12,617.78