Finding the Fourth Proportional to 11,978.05, 16,530.22 and 6,672.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.05 : 16,530.22 = 6,672.86 : x
2. Step 2: Convert to fraction form
   11,978.05/16,530.22 = 6,672.86/x
3. Step 3: Cross multiply
   11,978.05x = 16,530.22 × 6,672.86
4. Step 4: Simplify right side
   11,978.05x = 110,303,868.47
5. Step 5: Solve for x
   x = 110,303,868.47/11,978.05
6. Step 6: Final answer
   x = 9,208.84