Finding the Fourth Proportional to 30,969.25, 42,744.37 and 20,359.87

Step by Step Solution

1. Step 1: Write the proportion equation
   30,969.25 : 42,744.37 = 20,359.87 : x
2. Step 2: Convert to fraction form
   30,969.25/42,744.37 = 20,359.87/x
3. Step 3: Cross multiply
   30,969.25x = 42,744.37 × 20,359.87
4. Step 4: Simplify right side
   30,969.25x = 870,269,500.91
5. Step 5: Solve for x
   x = 870,269,500.91/30,969.25
6. Step 6: Final answer
   x = 28,101.09