Finding the Fourth Proportional to 20,391.49, 30,581.69 and 5,596.90

Step by Step Solution

1. Step 1: Write the proportion equation
   20,391.49 : 30,581.69 = 5,596.90 : x
2. Step 2: Convert to fraction form
   20,391.49/30,581.69 = 5,596.90/x
3. Step 3: Cross multiply
   20,391.49x = 30,581.69 × 5,596.90
4. Step 4: Simplify right side
   20,391.49x = 171,162,660.76
5. Step 5: Solve for x
   x = 171,162,660.76/20,391.49
6. Step 6: Final answer
   x = 8,393.83