Finding the Fourth Proportional to 16,288.81, 22,475.94 and 9,911.95

Step by Step Solution

1. Step 1: Write the proportion equation
   16,288.81 : 22,475.94 = 9,911.95 : x
2. Step 2: Convert to fraction form
   16,288.81/22,475.94 = 9,911.95/x
3. Step 3: Cross multiply
   16,288.81x = 22,475.94 × 9,911.95
4. Step 4: Simplify right side
   16,288.81x = 222,780,393.48
5. Step 5: Solve for x
   x = 222,780,393.48/16,288.81
6. Step 6: Final answer
   x = 13,676.90