Finding the Fourth Proportional to 30,766.31, 42,471.68 and 18,017.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,766.31 : 42,471.68 = 18,017.72 : x
2. Step 2: Convert to fraction form
   30,766.31/42,471.68 = 18,017.72/x
3. Step 3: Cross multiply
   30,766.31x = 42,471.68 × 18,017.72
4. Step 4: Simplify right side
   30,766.31x = 765,242,535.72
5. Step 5: Solve for x
   x = 765,242,535.72/30,766.31
6. Step 6: Final answer
   x = 24,872.75