Finding the Fourth Proportional to 30,573.30, 42,193.17 and 17,145.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,573.30 : 42,193.17 = 17,145.42 : x
2. Step 2: Convert to fraction form
   30,573.30/42,193.17 = 17,145.42/x
3. Step 3: Cross multiply
   30,573.30x = 42,193.17 × 17,145.42
4. Step 4: Simplify right side
   30,573.30x = 723,419,620.78
5. Step 5: Solve for x
   x = 723,419,620.78/30,573.30
6. Step 6: Final answer
   x = 23,661.81