Finding the Fourth Proportional to 30,788.73, 42,488.45 and 16,641.57

Step by Step Solution

1. Step 1: Write the proportion equation
   30,788.73 : 42,488.45 = 16,641.57 : x
2. Step 2: Convert to fraction form
   30,788.73/42,488.45 = 16,641.57/x
3. Step 3: Cross multiply
   30,788.73x = 42,488.45 × 16,641.57
4. Step 4: Simplify right side
   30,788.73x = 707,074,514.87
5. Step 5: Solve for x
   x = 707,074,514.87/30,788.73
6. Step 6: Final answer
   x = 22,965.37