Finding the Fourth Proportional to 11,109.72, 16,652.34 and 5,257.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,109.72 : 16,652.34 = 5,257.56 : x
2. Step 2: Convert to fraction form
   11,109.72/16,652.34 = 5,257.56/x
3. Step 3: Cross multiply
   11,109.72x = 16,652.34 × 5,257.56
4. Step 4: Simplify right side
   11,109.72x = 87,550,676.69
5. Step 5: Solve for x
   x = 87,550,676.69/11,109.72
6. Step 6: Final answer
   x = 7,880.55