Finding the Fourth Proportional to 30,986.28, 42,760.71 and 16,838.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,986.28 : 42,760.71 = 16,838.82 : x
2. Step 2: Convert to fraction form
   30,986.28/42,760.71 = 16,838.82/x
3. Step 3: Cross multiply
   30,986.28x = 42,760.71 × 16,838.82
4. Step 4: Simplify right side
   30,986.28x = 720,039,898.76
5. Step 5: Solve for x
   x = 720,039,898.76/30,986.28
6. Step 6: Final answer
   x = 23,237.38