Finding the Fourth Proportional to 30,991.50, 42,768.56 and 16,844.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991.50 : 42,768.56 = 16,844.38 : x
2. Step 2: Convert to fraction form
   30,991.50/42,768.56 = 16,844.38/x
3. Step 3: Cross multiply
   30,991.50x = 42,768.56 × 16,844.38
4. Step 4: Simplify right side
   30,991.50x = 720,409,876.69
5. Step 5: Solve for x
   x = 720,409,876.69/30,991.50
6. Step 6: Final answer
   x = 23,245.40