Finding the Fourth Proportional to 30,789.15, 42,489.06 and 16,642.02

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.15 : 42,489.06 = 16,642.02 : x
2. Step 2: Convert to fraction form
   30,789.15/42,489.06 = 16,642.02/x
3. Step 3: Cross multiply
   30,789.15x = 42,489.06 × 16,642.02
4. Step 4: Simplify right side
   30,789.15x = 707,103,786.30
5. Step 5: Solve for x
   x = 707,103,786.30/30,789.15
6. Step 6: Final answer
   x = 22,966.01