Finding the Fourth Proportional to 31,119.42, 42,949.59 and 18,373.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,119.42 : 42,949.59 = 18,373.96 : x
2. Step 2: Convert to fraction form
   31,119.42/42,949.59 = 18,373.96/x
3. Step 3: Cross multiply
   31,119.42x = 42,949.59 × 18,373.96
4. Step 4: Simplify right side
   31,119.42x = 789,154,048.68
5. Step 5: Solve for x
   x = 789,154,048.68/31,119.42
6. Step 6: Final answer
   x = 25,358.89