Finding the Fourth Proportional to 8,255.76, 12,388.78 and 5,141.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,255.76 : 12,388.78 = 5,141.88 : x
2. Step 2: Convert to fraction form
   8,255.76/12,388.78 = 5,141.88/x
3. Step 3: Cross multiply
   8,255.76x = 12,388.78 × 5,141.88
4. Step 4: Simplify right side
   8,255.76x = 63,701,620.11
5. Step 5: Solve for x
   x = 63,701,620.11/8,255.76
6. Step 6: Final answer
   x = 7,716.02