Finding the Fourth Proportional to 8,322.72, 11,500.56 and 7,917.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,322.72 : 11,500.56 = 7,917.76 : x
2. Step 2: Convert to fraction form
   8,322.72/11,500.56 = 7,917.76/x
3. Step 3: Cross multiply
   8,322.72x = 11,500.56 × 7,917.76
4. Step 4: Simplify right side
   8,322.72x = 91,058,673.95
5. Step 5: Solve for x
   x = 91,058,673.95/8,322.72
6. Step 6: Final answer
   x = 10,940.98