Finding the Fourth Proportional to 30,578.21, 42,195.94 and 17,149.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,578.21 : 42,195.94 = 17,149.37 : x
2. Step 2: Convert to fraction form
   30,578.21/42,195.94 = 17,149.37/x
3. Step 3: Cross multiply
   30,578.21x = 42,195.94 × 17,149.37
4. Step 4: Simplify right side
   30,578.21x = 723,633,787.56
5. Step 5: Solve for x
   x = 723,633,787.56/30,578.21
6. Step 6: Final answer
   x = 23,665.01