Finding the Fourth Proportional to 31,178.68, 43,019.46 and 18,601

Step by Step Solution

1. Step 1: Write the proportion equation
   31,178.68 : 43,019.46 = 18,601 : x
2. Step 2: Convert to fraction form
   31,178.68/43,019.46 = 18,601/x
3. Step 3: Cross multiply
   31,178.68x = 43,019.46 × 18,601
4. Step 4: Simplify right side
   31,178.68x = 800,204,975.46
5. Step 5: Solve for x
   x = 800,204,975.46/31,178.68
6. Step 6: Final answer
   x = 25,665.13