Finding the Fourth Proportional to 8,680.85, 11,978.71 and 4,851.77

Step by Step Solution

1. Step 1: Write the proportion equation
   8,680.85 : 11,978.71 = 4,851.77 : x
2. Step 2: Convert to fraction form
   8,680.85/11,978.71 = 4,851.77/x
3. Step 3: Cross multiply
   8,680.85x = 11,978.71 × 4,851.77
4. Step 4: Simplify right side
   8,680.85x = 58,117,945.82
5. Step 5: Solve for x
   x = 58,117,945.82/8,680.85
6. Step 6: Final answer
   x = 6,694.96