Finding the Fourth Proportional to 30,778.49, 42,474.30 and 16,631.33

Step by Step Solution

1. Step 1: Write the proportion equation
   30,778.49 : 42,474.30 = 16,631.33 : x
2. Step 2: Convert to fraction form
   30,778.49/42,474.30 = 16,631.33/x
3. Step 3: Cross multiply
   30,778.49x = 42,474.30 × 16,631.33
4. Step 4: Simplify right side
   30,778.49x = 706,404,099.82
5. Step 5: Solve for x
   x = 706,404,099.82/30,778.49
6. Step 6: Final answer
   x = 22,951.23