Finding the Fourth Proportional to 30,991.59, 42,768.88 and 16,844.47

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991.59 : 42,768.88 = 16,844.47 : x
2. Step 2: Convert to fraction form
   30,991.59/42,768.88 = 16,844.47/x
3. Step 3: Cross multiply
   30,991.59x = 42,768.88 × 16,844.47
4. Step 4: Simplify right side
   30,991.59x = 720,418,967.06
5. Step 5: Solve for x
   x = 720,418,967.06/30,991.59
6. Step 6: Final answer
   x = 23,245.63