Finding the Fourth Proportional to 30,783.28, 42,478.38 and 17,357.84

Step by Step Solution

1. Step 1: Write the proportion equation
   30,783.28 : 42,478.38 = 17,357.84 : x
2. Step 2: Convert to fraction form
   30,783.28/42,478.38 = 17,357.84/x
3. Step 3: Cross multiply
   30,783.28x = 42,478.38 × 17,357.84
4. Step 4: Simplify right side
   30,783.28x = 737,332,923.50
5. Step 5: Solve for x
   x = 737,332,923.50/30,783.28
6. Step 6: Final answer
   x = 23,952.38