Finding the Fourth Proportional to 30,578.82, 42,198.17 and 17,153.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,578.82 : 42,198.17 = 17,153.37 : x
2. Step 2: Convert to fraction form
   30,578.82/42,198.17 = 17,153.37/x
3. Step 3: Cross multiply
   30,578.82x = 42,198.17 × 17,153.37
4. Step 4: Simplify right side
   30,578.82x = 723,840,737.57
5. Step 5: Solve for x
   x = 723,840,737.57/30,578.82
6. Step 6: Final answer
   x = 23,671.31