Finding the Fourth Proportional to 21,992.50, 30,351.57 and 12,058.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,992.50 : 30,351.57 = 12,058.42 : x
2. Step 2: Convert to fraction form
   21,992.50/30,351.57 = 12,058.42/x
3. Step 3: Cross multiply
   21,992.50x = 30,351.57 × 12,058.42
4. Step 4: Simplify right side
   21,992.50x = 365,991,978.72
5. Step 5: Solve for x
   x = 365,991,978.72/21,992.50
6. Step 6: Final answer
   x = 16,641.67