Finding the Fourth Proportional to 12,005.82, 18,004.84 and 3,998.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,005.82 : 18,004.84 = 3,998.45 : x
2. Step 2: Convert to fraction form
   12,005.82/18,004.84 = 3,998.45/x
3. Step 3: Cross multiply
   12,005.82x = 18,004.84 × 3,998.45
4. Step 4: Simplify right side
   12,005.82x = 71,991,487.51
5. Step 5: Solve for x
   x = 71,991,487.51/12,005.82
6. Step 6: Final answer
   x = 5,996.38