Finding the Fourth Proportional to 30,976.72, 42,747.72 and 16,829.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,976.72 : 42,747.72 = 16,829.56 : x
2. Step 2: Convert to fraction form
   30,976.72/42,747.72 = 16,829.56/x
3. Step 3: Cross multiply
   30,976.72x = 42,747.72 × 16,829.56
4. Step 4: Simplify right side
   30,976.72x = 719,425,318.60
5. Step 5: Solve for x
   x = 719,425,318.60/30,976.72
6. Step 6: Final answer
   x = 23,224.71