Finding the Fourth Proportional to 30,789.59, 42,489.69 and 16,642.44

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.59 : 42,489.69 = 16,642.44 : x
2. Step 2: Convert to fraction form
   30,789.59/42,489.69 = 16,642.44/x
3. Step 3: Cross multiply
   30,789.59x = 42,489.69 × 16,642.44
4. Step 4: Simplify right side
   30,789.59x = 707,132,116.44
5. Step 5: Solve for x
   x = 707,132,116.44/30,789.59
6. Step 6: Final answer
   x = 22,966.60