Finding the Fourth Proportional to 30,458.12, 42,034.23 and 17,031.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,458.12 : 42,034.23 = 17,031.78 : x
2. Step 2: Convert to fraction form
   30,458.12/42,034.23 = 17,031.78/x
3. Step 3: Cross multiply
   30,458.12x = 42,034.23 × 17,031.78
4. Step 4: Simplify right side
   30,458.12x = 715,917,757.83
5. Step 5: Solve for x
   x = 715,917,757.83/30,458.12
6. Step 6: Final answer
   x = 23,504.99