Finding the Fourth Proportional to 21,994, 30,351.72 and 12,058

Step by Step Solution

1. Step 1: Write the proportion equation
   21,994 : 30,351.72 = 12,058 : x
2. Step 2: Convert to fraction form
   21,994/30,351.72 = 12,058/x
3. Step 3: Cross multiply
   21,994x = 30,351.72 × 12,058
4. Step 4: Simplify right side
   21,994x = 365,981,039.76
5. Step 5: Solve for x
   x = 365,981,039.76/21,994
6. Step 6: Final answer
   x = 16,640.04