Finding the Fourth Proportional to 9,680.96, 13,367.25 and 7,439.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,680.96 : 13,367.25 = 7,439.30 : x
2. Step 2: Convert to fraction form
   9,680.96/13,367.25 = 7,439.30/x
3. Step 3: Cross multiply
   9,680.96x = 13,367.25 × 7,439.30
4. Step 4: Simplify right side
   9,680.96x = 99,442,982.93
5. Step 5: Solve for x
   x = 99,442,982.93/9,680.96
6. Step 6: Final answer
   x = 10,272.02