Finding the Fourth Proportional to 9,687.61, 13,367.31 and 5,708.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687.61 : 13,367.31 = 5,708.18 : x
2. Step 2: Convert to fraction form
   9,687.61/13,367.31 = 5,708.18/x
3. Step 3: Cross multiply
   9,687.61x = 13,367.31 × 5,708.18
4. Step 4: Simplify right side
   9,687.61x = 76,302,966.35
5. Step 5: Solve for x
   x = 76,302,966.35/9,687.61
6. Step 6: Final answer
   x = 7,876.35