Finding the Fourth Proportional to 6,456.72, 9,680.76 and 2,992.08

Step by Step Solution

1. Step 1: Write the proportion equation
   6,456.72 : 9,680.76 = 2,992.08 : x
2. Step 2: Convert to fraction form
   6,456.72/9,680.76 = 2,992.08/x
3. Step 3: Cross multiply
   6,456.72x = 9,680.76 × 2,992.08
4. Step 4: Simplify right side
   6,456.72x = 28,965,608.38
5. Step 5: Solve for x
   x = 28,965,608.38/6,456.72
6. Step 6: Final answer
   x = 4,486.12