Finding the Fourth Proportional to 10,563.54, 15,849.59 and 3,991.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,563.54 : 15,849.59 = 3,991.61 : x
2. Step 2: Convert to fraction form
   10,563.54/15,849.59 = 3,991.61/x
3. Step 3: Cross multiply
   10,563.54x = 15,849.59 × 3,991.61
4. Step 4: Simplify right side
   10,563.54x = 63,265,282.73
5. Step 5: Solve for x
   x = 63,265,282.73/10,563.54
6. Step 6: Final answer
   x = 5,989.02