Finding the Fourth Proportional to 21,817.69, 30,108.41 and 11,881.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,817.69 : 30,108.41 = 11,881.69 : x
2. Step 2: Convert to fraction form
   21,817.69/30,108.41 = 11,881.69/x
3. Step 3: Cross multiply
   21,817.69x = 30,108.41 × 11,881.69
4. Step 4: Simplify right side
   21,817.69x = 357,738,703.89
5. Step 5: Solve for x
   x = 357,738,703.89/21,817.69
6. Step 6: Final answer
   x = 16,396.73