Finding the Fourth Proportional to 31,131.92, 42,960.90 and 16,984.46

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.92 : 42,960.90 = 16,984.46 : x
2. Step 2: Convert to fraction form
   31,131.92/42,960.90 = 16,984.46/x
3. Step 3: Cross multiply
   31,131.92x = 42,960.90 × 16,984.46
4. Step 4: Simplify right side
   31,131.92x = 729,667,687.61
5. Step 5: Solve for x
   x = 729,667,687.61/31,131.92
6. Step 6: Final answer
   x = 23,437.93