Finding the Fourth Proportional to 8,976.70, 12,380.88 and 7,969.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,976.70 : 12,380.88 = 7,969.47 : x
2. Step 2: Convert to fraction form
   8,976.70/12,380.88 = 7,969.47/x
3. Step 3: Cross multiply
   8,976.70x = 12,380.88 × 7,969.47
4. Step 4: Simplify right side
   8,976.70x = 98,669,051.73
5. Step 5: Solve for x
   x = 98,669,051.73/8,976.70
6. Step 6: Final answer
   x = 10,991.68