Finding the Fourth Proportional to 20,513.94, 30,768.17 and 5,721.62

Step by Step Solution

1. Step 1: Write the proportion equation
   20,513.94 : 30,768.17 = 5,721.62 : x
2. Step 2: Convert to fraction form
   20,513.94/30,768.17 = 5,721.62/x
3. Step 3: Cross multiply
   20,513.94x = 30,768.17 × 5,721.62
4. Step 4: Simplify right side
   20,513.94x = 176,043,637.30
5. Step 5: Solve for x
   x = 176,043,637.30/20,513.94
6. Step 6: Final answer
   x = 8,581.66