Finding the Fourth Proportional to 72,509.73, 108,743.55 and 30,388.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,509.73 : 108,743.55 = 30,388.71 : x
2. Step 2: Convert to fraction form
   72,509.73/108,743.55 = 30,388.71/x
3. Step 3: Cross multiply
   72,509.73x = 108,743.55 × 30,388.71
4. Step 4: Simplify right side
   72,509.73x = 3,304,576,205.32
5. Step 5: Solve for x
   x = 3,304,576,205.32/72,509.73
6. Step 6: Final answer
   x = 45,574.25