Finding the Fourth Proportional to 30,788.89, 42,488.58 and 16,641.70

Step by Step Solution

1. Step 1: Write the proportion equation
   30,788.89 : 42,488.58 = 16,641.70 : x
2. Step 2: Convert to fraction form
   30,788.89/42,488.58 = 16,641.70/x
3. Step 3: Cross multiply
   30,788.89x = 42,488.58 × 16,641.70
4. Step 4: Simplify right side
   30,788.89x = 707,082,201.79
5. Step 5: Solve for x
   x = 707,082,201.79/30,788.89
6. Step 6: Final answer
   x = 22,965.50