Finding the Fourth Proportional to 30,991, 42,767.42 and 16,843.92

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991 : 42,767.42 = 16,843.92 : x
2. Step 2: Convert to fraction form
   30,991/42,767.42 = 16,843.92/x
3. Step 3: Cross multiply
   30,991x = 42,767.42 × 16,843.92
4. Step 4: Simplify right side
   30,991x = 720,371,001.09
5. Step 5: Solve for x
   x = 720,371,001.09/30,991
6. Step 6: Final answer
   x = 23,244.52