Finding the Fourth Proportional to 11,005.39, 16,507.91 and 4,431.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,005.39 : 16,507.91 = 4,431.42 : x
2. Step 2: Convert to fraction form
   11,005.39/16,507.91 = 4,431.42/x
3. Step 3: Cross multiply
   11,005.39x = 16,507.91 × 4,431.42
4. Step 4: Simplify right side
   11,005.39x = 73,153,493.61
5. Step 5: Solve for x
   x = 73,153,493.61/11,005.39
6. Step 6: Final answer
   x = 6,647.06