Finding the Fourth Proportional to 30,789.43, 42,489.42 and 16,642.27

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.43 : 42,489.42 = 16,642.27 : x
2. Step 2: Convert to fraction form
   30,789.43/42,489.42 = 16,642.27/x
3. Step 3: Cross multiply
   30,789.43x = 42,489.42 × 16,642.27
4. Step 4: Simplify right side
   30,789.43x = 707,120,567.25
5. Step 5: Solve for x
   x = 707,120,567.25/30,789.43
6. Step 6: Final answer
   x = 22,966.34