Finding the Fourth Proportional to 8,485.89, 11,710.59 and 4,709.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.89 : 11,710.59 = 4,709.31 : x
2. Step 2: Convert to fraction form
   8,485.89/11,710.59 = 4,709.31/x
3. Step 3: Cross multiply
   8,485.89x = 11,710.59 × 4,709.31
4. Step 4: Simplify right side
   8,485.89x = 55,148,798.59
5. Step 5: Solve for x
   x = 55,148,798.59/8,485.89
6. Step 6: Final answer
   x = 6,498.88