Finding the Fourth Proportional to 30,991.57, 42,768.50 and 16,844.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991.57 : 42,768.50 = 16,844.42 : x
2. Step 2: Convert to fraction form
   30,991.57/42,768.50 = 16,844.42/x
3. Step 3: Cross multiply
   30,991.57x = 42,768.50 × 16,844.42
4. Step 4: Simplify right side
   30,991.57x = 720,410,599.47
5. Step 5: Solve for x
   x = 720,410,599.47/30,991.57
6. Step 6: Final answer
   x = 23,245.37