Finding the Fourth Proportional to 10,827.76, 16,209.96 and 9,790.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,827.76 : 16,209.96 = 9,790.15 : x
2. Step 2: Convert to fraction form
   10,827.76/16,209.96 = 9,790.15/x
3. Step 3: Cross multiply
   10,827.76x = 16,209.96 × 9,790.15
4. Step 4: Simplify right side
   10,827.76x = 158,697,939.89
5. Step 5: Solve for x
   x = 158,697,939.89/10,827.76
6. Step 6: Final answer
   x = 14,656.58