Finding the Fourth Proportional to 10,974.48, 16,465.58 and 5,431.65

Step by Step Solution

1. Step 1: Write the proportion equation
   10,974.48 : 16,465.58 = 5,431.65 : x
2. Step 2: Convert to fraction form
   10,974.48/16,465.58 = 5,431.65/x
3. Step 3: Cross multiply
   10,974.48x = 16,465.58 × 5,431.65
4. Step 4: Simplify right side
   10,974.48x = 89,435,267.61
5. Step 5: Solve for x
   x = 89,435,267.61/10,974.48
6. Step 6: Final answer
   x = 8,149.39