Finding the Fourth Proportional to 11,978.89, 16,530.15 and 6,672.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.89 : 16,530.15 = 6,672.76 : x
2. Step 2: Convert to fraction form
   11,978.89/16,530.15 = 6,672.76/x
3. Step 3: Cross multiply
   11,978.89x = 16,530.15 × 6,672.76
4. Step 4: Simplify right side
   11,978.89x = 110,301,723.71
5. Step 5: Solve for x
   x = 110,301,723.71/11,978.89
6. Step 6: Final answer
   x = 9,208.01