Finding the Fourth Proportional to 30,789.07, 42,488.91 and 16,641.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.07 : 42,488.91 = 16,641.91 : x
2. Step 2: Convert to fraction form
   30,789.07/42,488.91 = 16,641.91/x
3. Step 3: Cross multiply
   30,789.07x = 42,488.91 × 16,641.91
4. Step 4: Simplify right side
   30,789.07x = 707,096,616.22
5. Step 5: Solve for x
   x = 707,096,616.22/30,789.07
6. Step 6: Final answer
   x = 22,965.83