Finding the Fourth Proportional to 16,105.88, 22,228.54 and 9,821.90

Step by Step Solution

1. Step 1: Write the proportion equation
   16,105.88 : 22,228.54 = 9,821.90 : x
2. Step 2: Convert to fraction form
   16,105.88/22,228.54 = 9,821.90/x
3. Step 3: Cross multiply
   16,105.88x = 22,228.54 × 9,821.90
4. Step 4: Simplify right side
   16,105.88x = 218,326,361.33
5. Step 5: Solve for x
   x = 218,326,361.33/16,105.88
6. Step 6: Final answer
   x = 13,555.70