Finding the Fourth Proportional to 9,608.40, 14,418.72 and 8,886.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,608.40 : 14,418.72 = 8,886.96 : x
2. Step 2: Convert to fraction form
   9,608.40/14,418.72 = 8,886.96/x
3. Step 3: Cross multiply
   9,608.40x = 14,418.72 × 8,886.96
4. Step 4: Simplify right side
   9,608.40x = 128,138,587.89
5. Step 5: Solve for x
   x = 128,138,587.89/9,608.40
6. Step 6: Final answer
   x = 13,336.10