Finding the Fourth Proportional to 9,915.78, 14,896.88 and 9,355.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.78 : 14,896.88 = 9,355.34 : x
2. Step 2: Convert to fraction form
   9,915.78/14,896.88 = 9,355.34/x
3. Step 3: Cross multiply
   9,915.78x = 14,896.88 × 9,355.34
4. Step 4: Simplify right side
   9,915.78x = 139,365,377.34
5. Step 5: Solve for x
   x = 139,365,377.34/9,915.78
6. Step 6: Final answer
   x = 14,054.91