Finding the Fourth Proportional to 30,986.38, 42,760.99 and 16,839.22

Step by Step Solution

1. Step 1: Write the proportion equation
   30,986.38 : 42,760.99 = 16,839.22 : x
2. Step 2: Convert to fraction form
   30,986.38/42,760.99 = 16,839.22/x
3. Step 3: Cross multiply
   30,986.38x = 42,760.99 × 16,839.22
4. Step 4: Simplify right side
   30,986.38x = 720,061,718.03
5. Step 5: Solve for x
   x = 720,061,718.03/30,986.38
6. Step 6: Final answer
   x = 23,238.01