Finding the Fourth Proportional to 30,601.12, 42,216.24 and 18,662.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,601.12 : 42,216.24 = 18,662.56 : x
2. Step 2: Convert to fraction form
   30,601.12/42,216.24 = 18,662.56/x
3. Step 3: Cross multiply
   30,601.12x = 42,216.24 × 18,662.56
4. Step 4: Simplify right side
   30,601.12x = 787,863,111.97
5. Step 5: Solve for x
   x = 787,863,111.97/30,601.12
6. Step 6: Final answer
   x = 25,746.22