Finding the Fourth Proportional to 20,288.34, 30,436.83 and 8,601.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,288.34 : 30,436.83 = 8,601.30 : x
2. Step 2: Convert to fraction form
   20,288.34/30,436.83 = 8,601.30/x
3. Step 3: Cross multiply
   20,288.34x = 30,436.83 × 8,601.30
4. Step 4: Simplify right side
   20,288.34x = 261,796,305.88
5. Step 5: Solve for x
   x = 261,796,305.88/20,288.34
6. Step 6: Final answer
   x = 12,903.78