Finding the Fourth Proportional to 10,978.46, 16,469.28 and 3,581.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.46 : 16,469.28 = 3,581.09 : x
2. Step 2: Convert to fraction form
   10,978.46/16,469.28 = 3,581.09/x
3. Step 3: Cross multiply
   10,978.46x = 16,469.28 × 3,581.09
4. Step 4: Simplify right side
   10,978.46x = 58,977,973.92
5. Step 5: Solve for x
   x = 58,977,973.92/10,978.46
6. Step 6: Final answer
   x = 5,372.15