Finding the Fourth Proportional to 12,282.72, 16,949.76 and 6,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,282.72 : 16,949.76 = 6,978.72 : x
2. Step 2: Convert to fraction form
   12,282.72/16,949.76 = 6,978.72/x
3. Step 3: Cross multiply
   12,282.72x = 16,949.76 × 6,978.72
4. Step 4: Simplify right side
   12,282.72x = 118,287,629.11
5. Step 5: Solve for x
   x = 118,287,629.11/12,282.72
6. Step 6: Final answer
   x = 9,630.41