Finding the Fourth Proportional to 11,978.72, 16,530.20 and 6,673.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.72 : 16,530.20 = 6,673.42 : x
2. Step 2: Convert to fraction form
   11,978.72/16,530.20 = 6,673.42/x
3. Step 3: Cross multiply
   11,978.72x = 16,530.20 × 6,673.42
4. Step 4: Simplify right side
   11,978.72x = 110,312,967.28
5. Step 5: Solve for x
   x = 110,312,967.28/11,978.72
6. Step 6: Final answer
   x = 9,209.08