Finding the Fourth Proportional to 30,619.72, 42,245.94 and 17,189.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,619.72 : 42,245.94 = 17,189.56 : x
2. Step 2: Convert to fraction form
   30,619.72/42,245.94 = 17,189.56/x
3. Step 3: Cross multiply
   30,619.72x = 42,245.94 × 17,189.56
4. Step 4: Simplify right side
   30,619.72x = 726,189,120.39
5. Step 5: Solve for x
   x = 726,189,120.39/30,619.72
6. Step 6: Final answer
   x = 23,716.39