Finding the Fourth Proportional to 30,809.25, 42,516.78 and 16,662.09

Step by Step Solution

1. Step 1: Write the proportion equation
   30,809.25 : 42,516.78 = 16,662.09 : x
2. Step 2: Convert to fraction form
   30,809.25/42,516.78 = 16,662.09/x
3. Step 3: Cross multiply
   30,809.25x = 42,516.78 × 16,662.09
4. Step 4: Simplify right side
   30,809.25x = 708,418,414.87
5. Step 5: Solve for x
   x = 708,418,414.87/30,809.25
6. Step 6: Final answer
   x = 22,993.69