Finding the Fourth Proportional to 9,915.12, 13,652.82 and 9,696.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.12 : 13,652.82 = 9,696.42 : x
2. Step 2: Convert to fraction form
   9,915.12/13,652.82 = 9,696.42/x
3. Step 3: Cross multiply
   9,915.12x = 13,652.82 × 9,696.42
4. Step 4: Simplify right side
   9,915.12x = 132,383,476.90
5. Step 5: Solve for x
   x = 132,383,476.90/9,915.12
6. Step 6: Final answer
   x = 13,351.68