Finding the Fourth Proportional to 30,957, 42,721.46 and 16,809.84

Step by Step Solution

1. Step 1: Write the proportion equation
   30,957 : 42,721.46 = 16,809.84 : x
2. Step 2: Convert to fraction form
   30,957/42,721.46 = 16,809.84/x
3. Step 3: Cross multiply
   30,957x = 42,721.46 × 16,809.84
4. Step 4: Simplify right side
   30,957x = 718,140,907.17
5. Step 5: Solve for x
   x = 718,140,907.17/30,957
6. Step 6: Final answer
   x = 23,198.01