Finding the Fourth Proportional to 67,424.72, 101,128.44 and 20,673.68

Step by Step Solution

1. Step 1: Write the proportion equation
   67,424.72 : 101,128.44 = 20,673.68 : x
2. Step 2: Convert to fraction form
   67,424.72/101,128.44 = 20,673.68/x
3. Step 3: Cross multiply
   67,424.72x = 101,128.44 × 20,673.68
4. Step 4: Simplify right side
   67,424.72x = 2,090,697,007.46
5. Step 5: Solve for x
   x = 2,090,697,007.46/67,424.72
6. Step 6: Final answer
   x = 31,007.87