Finding the Fourth Proportional to 10,885.20, 16,327.89 and 3,489.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,885.20 : 16,327.89 = 3,489.72 : x
2. Step 2: Convert to fraction form
   10,885.20/16,327.89 = 3,489.72/x
3. Step 3: Cross multiply
   10,885.20x = 16,327.89 × 3,489.72
4. Step 4: Simplify right side
   10,885.20x = 56,979,764.29
5. Step 5: Solve for x
   x = 56,979,764.29/10,885.20
6. Step 6: Final answer
   x = 5,234.61