Finding the Fourth Proportional to 10,890.10, 16,340.10 and 6,456.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890.10 : 16,340.10 = 6,456.52 : x
2. Step 2: Convert to fraction form
   10,890.10/16,340.10 = 6,456.52/x
3. Step 3: Cross multiply
   10,890.10x = 16,340.10 × 6,456.52
4. Step 4: Simplify right side
   10,890.10x = 105,500,182.45
5. Step 5: Solve for x
   x = 105,500,182.45/10,890.10
6. Step 6: Final answer
   x = 9,687.71