Finding the Fourth Proportional to 8,453.76, 11,662.72 and 5,766.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,453.76 : 11,662.72 = 5,766.40 : x
2. Step 2: Convert to fraction form
   8,453.76/11,662.72 = 5,766.40/x
3. Step 3: Cross multiply
   8,453.76x = 11,662.72 × 5,766.40
4. Step 4: Simplify right side
   8,453.76x = 67,251,908.61
5. Step 5: Solve for x
   x = 67,251,908.61/8,453.76
6. Step 6: Final answer
   x = 7,955.27