Finding the Fourth Proportional to 11,978.69, 16,531.09 and 6,673.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.69 : 16,531.09 = 6,673.50 : x
2. Step 2: Convert to fraction form
   11,978.69/16,531.09 = 6,673.50/x
3. Step 3: Cross multiply
   11,978.69x = 16,531.09 × 6,673.50
4. Step 4: Simplify right side
   11,978.69x = 110,320,212.43
5. Step 5: Solve for x
   x = 110,320,212.43/11,978.69
6. Step 6: Final answer
   x = 9,209.71