Finding the Fourth Proportional to 10,721.67, 16,088.00 and 5,105.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,721.67 : 16,088.00 = 5,105.69 : x
2. Step 2: Convert to fraction form
   10,721.67/16,088.00 = 5,105.69/x
3. Step 3: Cross multiply
   10,721.67x = 16,088.00 × 5,105.69
4. Step 4: Simplify right side
   10,721.67x = 82,140,234.75
5. Step 5: Solve for x
   x = 82,140,234.75/10,721.67
6. Step 6: Final answer
   x = 7,661.14