Finding the Fourth Proportional to 19,996.94, 30,005.57 and 12,118.28

Step by Step Solution

1. Step 1: Write the proportion equation
   19,996.94 : 30,005.57 = 12,118.28 : x
2. Step 2: Convert to fraction form
   19,996.94/30,005.57 = 12,118.28/x
3. Step 3: Cross multiply
   19,996.94x = 30,005.57 × 12,118.28
4. Step 4: Simplify right side
   19,996.94x = 363,615,898.82
5. Step 5: Solve for x
   x = 363,615,898.82/19,996.94
6. Step 6: Final answer
   x = 18,183.58