Finding the Fourth Proportional to 9,686.72, 13,370.88 and 5,708.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,686.72 : 13,370.88 = 5,708.96 : x
2. Step 2: Convert to fraction form
   9,686.72/13,370.88 = 5,708.96/x
3. Step 3: Cross multiply
   9,686.72x = 13,370.88 × 5,708.96
4. Step 4: Simplify right side
   9,686.72x = 76,333,819.08
5. Step 5: Solve for x
   x = 76,333,819.08/9,686.72
6. Step 6: Final answer
   x = 7,880.25