Finding the Fourth Proportional to 30,789.62, 42,489.68 and 16,642.46

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.62 : 42,489.68 = 16,642.46 : x
2. Step 2: Convert to fraction form
   30,789.62/42,489.68 = 16,642.46/x
3. Step 3: Cross multiply
   30,789.62x = 42,489.68 × 16,642.46
4. Step 4: Simplify right side
   30,789.62x = 707,132,867.98
5. Step 5: Solve for x
   x = 707,132,867.98/30,789.62
6. Step 6: Final answer
   x = 22,966.60