Finding the Fourth Proportional to 39,993.62, 59,997.72 and 20,013.56

Step by Step Solution

1. Step 1: Write the proportion equation
   39,993.62 : 59,997.72 = 20,013.56 : x
2. Step 2: Convert to fraction form
   39,993.62/59,997.72 = 20,013.56/x
3. Step 3: Cross multiply
   39,993.62x = 59,997.72 × 20,013.56
4. Step 4: Simplify right side
   39,993.62x = 1,200,767,969.08
5. Step 5: Solve for x
   x = 1,200,767,969.08/39,993.62
6. Step 6: Final answer
   x = 30,023.99