Finding the Fourth Proportional to 11,005.27, 16,507.72 and 4,431.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,005.27 : 16,507.72 = 4,431.30 : x
2. Step 2: Convert to fraction form
   11,005.27/16,507.72 = 4,431.30/x
3. Step 3: Cross multiply
   11,005.27x = 16,507.72 × 4,431.30
4. Step 4: Simplify right side
   11,005.27x = 73,150,659.64
5. Step 5: Solve for x
   x = 73,150,659.64/11,005.27
6. Step 6: Final answer
   x = 6,646.88