Finding the Fourth Proportional to 30,984.72, 42,759.72 and 18,238.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,984.72 : 42,759.72 = 18,238.56 : x
2. Step 2: Convert to fraction form
   30,984.72/42,759.72 = 18,238.56/x
3. Step 3: Cross multiply
   30,984.72x = 42,759.72 × 18,238.56
4. Step 4: Simplify right side
   30,984.72x = 779,875,718.80
5. Step 5: Solve for x
   x = 779,875,718.80/30,984.72
6. Step 6: Final answer
   x = 25,169.69