Finding the Fourth Proportional to 21,850.91, 30,155.15 and 12,291.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,850.91 : 30,155.15 = 12,291.24 : x
2. Step 2: Convert to fraction form
   21,850.91/30,155.15 = 12,291.24/x
3. Step 3: Cross multiply
   21,850.91x = 30,155.15 × 12,291.24
4. Step 4: Simplify right side
   21,850.91x = 370,644,185.89
5. Step 5: Solve for x
   x = 370,644,185.89/21,850.91
6. Step 6: Final answer
   x = 16,962.41