Finding the Fourth Proportional to 8,561.82, 12,813.53 and 7,176.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.82 : 12,813.53 = 7,176.72 : x
2. Step 2: Convert to fraction form
   8,561.82/12,813.53 = 7,176.72/x
3. Step 3: Cross multiply
   8,561.82x = 12,813.53 × 7,176.72
4. Step 4: Simplify right side
   8,561.82x = 91,959,081.14
5. Step 5: Solve for x
   x = 91,959,081.14/8,561.82
6. Step 6: Final answer
   x = 10,740.60