Finding the Fourth Proportional to 30,789.27, 42,489.23 and 16,642.13

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.27 : 42,489.23 = 16,642.13 : x
2. Step 2: Convert to fraction form
   30,789.27/42,489.23 = 16,642.13/x
3. Step 3: Cross multiply
   30,789.27x = 42,489.23 × 16,642.13
4. Step 4: Simplify right side
   30,789.27x = 707,110,993.60
5. Step 5: Solve for x
   x = 707,110,993.60/30,789.27
6. Step 6: Final answer
   x = 22,966.15