Finding the Fourth Proportional to 31,082.67, 42,908.49 and 18,331.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,082.67 : 42,908.49 = 18,331.56 : x
2. Step 2: Convert to fraction form
   31,082.67/42,908.49 = 18,331.56/x
3. Step 3: Cross multiply
   31,082.67x = 42,908.49 × 18,331.56
4. Step 4: Simplify right side
   31,082.67x = 786,579,558.94
5. Step 5: Solve for x
   x = 786,579,558.94/31,082.67
6. Step 6: Final answer
   x = 25,306.05