Finding the Fourth Proportional to 8,520.77, 11,760.72 and 4,984.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,520.77 : 11,760.72 = 4,984.31 : x
2. Step 2: Convert to fraction form
   8,520.77/11,760.72 = 4,984.31/x
3. Step 3: Cross multiply
   8,520.77x = 11,760.72 × 4,984.31
4. Step 4: Simplify right side
   8,520.77x = 58,619,074.30
5. Step 5: Solve for x
   x = 58,619,074.30/8,520.77
6. Step 6: Final answer
   x = 6,879.55