Finding the Fourth Proportional to 10,721.50, 16,078.30 and 3,699.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,721.50 : 16,078.30 = 3,699.72 : x
2. Step 2: Convert to fraction form
   10,721.50/16,078.30 = 3,699.72/x
3. Step 3: Cross multiply
   10,721.50x = 16,078.30 × 3,699.72
4. Step 4: Simplify right side
   10,721.50x = 59,485,198.83
5. Step 5: Solve for x
   x = 59,485,198.83/10,721.50
6. Step 6: Final answer
   x = 5,548.22