Finding the Fourth Proportional to 30,788.71, 42,488.42 and 16,641.55

Step by Step Solution

1. Step 1: Write the proportion equation
   30,788.71 : 42,488.42 = 16,641.55 : x
2. Step 2: Convert to fraction form
   30,788.71/42,488.42 = 16,641.55/x
3. Step 3: Cross multiply
   30,788.71x = 42,488.42 × 16,641.55
4. Step 4: Simplify right side
   30,788.71x = 707,073,135.75
5. Step 5: Solve for x
   x = 707,073,135.75/30,788.71
6. Step 6: Final answer
   x = 22,965.34