Finding the Fourth Proportional to 10,984.89, 16,456.65 and 5,431.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,984.89 : 16,456.65 = 5,431.73 : x
2. Step 2: Convert to fraction form
   10,984.89/16,456.65 = 5,431.73/x
3. Step 3: Cross multiply
   10,984.89x = 16,456.65 × 5,431.73
4. Step 4: Simplify right side
   10,984.89x = 89,388,079.50
5. Step 5: Solve for x
   x = 89,388,079.50/10,984.89
6. Step 6: Final answer
   x = 8,137.37