Finding the Fourth Proportional to 30,672.20, 42,325.71 and 17,243.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,672.20 : 42,325.71 = 17,243.28 : x
2. Step 2: Convert to fraction form
   30,672.20/42,325.71 = 17,243.28/x
3. Step 3: Cross multiply
   30,672.20x = 42,325.71 × 17,243.28
4. Step 4: Simplify right side
   30,672.20x = 729,834,068.73
5. Step 5: Solve for x
   x = 729,834,068.73/30,672.20
6. Step 6: Final answer
   x = 23,794.65