Finding the Fourth Proportional to 30,738.89, 42,410.49 and 18,789.67

Step by Step Solution

1. Step 1: Write the proportion equation
   30,738.89 : 42,410.49 = 18,789.67 : x
2. Step 2: Convert to fraction form
   30,738.89/42,410.49 = 18,789.67/x
3. Step 3: Cross multiply
   30,738.89x = 42,410.49 × 18,789.67
4. Step 4: Simplify right side
   30,738.89x = 796,879,094.19
5. Step 5: Solve for x
   x = 796,879,094.19/30,738.89
6. Step 6: Final answer
   x = 25,924.13