Finding the Fourth Proportional to 9,936.87, 13,682.84 and 9,718.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,936.87 : 13,682.84 = 9,718.17 : x
2. Step 2: Convert to fraction form
   9,936.87/13,682.84 = 9,718.17/x
3. Step 3: Cross multiply
   9,936.87x = 13,682.84 × 9,718.17
4. Step 4: Simplify right side
   9,936.87x = 132,972,116.61
5. Step 5: Solve for x
   x = 132,972,116.61/9,936.87
6. Step 6: Final answer
   x = 13,381.69