Finding the Fourth Proportional to 9,209.92, 13,725.56 and 8,914.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,209.92 : 13,725.56 = 8,914.72 : x
2. Step 2: Convert to fraction form
   9,209.92/13,725.56 = 8,914.72/x
3. Step 3: Cross multiply
   9,209.92x = 13,725.56 × 8,914.72
4. Step 4: Simplify right side
   9,209.92x = 122,359,524.24
5. Step 5: Solve for x
   x = 122,359,524.24/9,209.92
6. Step 6: Final answer
   x = 13,285.62