Finding the Fourth Proportional to 12,039.98, 18,057.06 and 5,020.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,039.98 : 18,057.06 = 5,020.09 : x
2. Step 2: Convert to fraction form
   12,039.98/18,057.06 = 5,020.09/x
3. Step 3: Cross multiply
   12,039.98x = 18,057.06 × 5,020.09
4. Step 4: Simplify right side
   12,039.98x = 90,647,976.05
5. Step 5: Solve for x
   x = 90,647,976.05/12,039.98
6. Step 6: Final answer
   x = 7,528.91