Finding the Fourth Proportional to 31,019.05, 42,806.55 and 18,441.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.05 : 42,806.55 = 18,441.37 : x
2. Step 2: Convert to fraction form
   31,019.05/42,806.55 = 18,441.37/x
3. Step 3: Cross multiply
   31,019.05x = 42,806.55 × 18,441.37
4. Step 4: Simplify right side
   31,019.05x = 789,411,426.97
5. Step 5: Solve for x
   x = 789,411,426.97/31,019.05
6. Step 6: Final answer
   x = 25,449.25