Finding the Fourth Proportional to 10,721.69, 16,081.76 and 3,325.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,721.69 : 16,081.76 = 3,325.96 : x
2. Step 2: Convert to fraction form
   10,721.69/16,081.76 = 3,325.96/x
3. Step 3: Cross multiply
   10,721.69x = 16,081.76 × 3,325.96
4. Step 4: Simplify right side
   10,721.69x = 53,487,228.45
5. Step 5: Solve for x
   x = 53,487,228.45/10,721.69
6. Step 6: Final answer
   x = 4,988.69