Finding the Fourth Proportional to 9,680.89, 13,360.19 and 5,431.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,680.89 : 13,360.19 = 5,431.73 : x
2. Step 2: Convert to fraction form
   9,680.89/13,360.19 = 5,431.73/x
3. Step 3: Cross multiply
   9,680.89x = 13,360.19 × 5,431.73
4. Step 4: Simplify right side
   9,680.89x = 72,568,994.15
5. Step 5: Solve for x
   x = 72,568,994.15/9,680.89
6. Step 6: Final answer
   x = 7,496.11