Finding the Fourth Proportional to 9,708.56, 13,398.12 and 5,516.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,708.56 : 13,398.12 = 5,516.72 : x
2. Step 2: Convert to fraction form
   9,708.56/13,398.12 = 5,516.72/x
3. Step 3: Cross multiply
   9,708.56x = 13,398.12 × 5,516.72
4. Step 4: Simplify right side
   9,708.56x = 73,913,676.57
5. Step 5: Solve for x
   x = 73,913,676.57/9,708.56
6. Step 6: Final answer
   x = 7,613.25