Finding the Fourth Proportional to 30,687.63, 42,344.55 and 17,258.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,687.63 : 42,344.55 = 17,258.37 : x
2. Step 2: Convert to fraction form
   30,687.63/42,344.55 = 17,258.37/x
3. Step 3: Cross multiply
   30,687.63x = 42,344.55 × 17,258.37
4. Step 4: Simplify right side
   30,687.63x = 730,797,911.38
5. Step 5: Solve for x
   x = 730,797,911.38/30,687.63
6. Step 6: Final answer
   x = 23,814.09