Finding the Fourth Proportional to 10,728.22, 14,789.82 and 9,251.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,728.22 : 14,789.82 = 9,251.86 : x
2. Step 2: Convert to fraction form
   10,728.22/14,789.82 = 9,251.86/x
3. Step 3: Cross multiply
   10,728.22x = 14,789.82 × 9,251.86
4. Step 4: Simplify right side
   10,728.22x = 136,833,344.07
5. Step 5: Solve for x
   x = 136,833,344.07/10,728.22
6. Step 6: Final answer
   x = 12,754.52