Finding the Fourth Proportional to 6,469.59, 9,705.62 and 2,085.87

Step by Step Solution

1. Step 1: Write the proportion equation
   6,469.59 : 9,705.62 = 2,085.87 : x
2. Step 2: Convert to fraction form
   6,469.59/9,705.62 = 2,085.87/x
3. Step 3: Cross multiply
   6,469.59x = 9,705.62 × 2,085.87
4. Step 4: Simplify right side
   6,469.59x = 20,244,661.59
5. Step 5: Solve for x
   x = 20,244,661.59/6,469.59
6. Step 6: Final answer
   x = 3,129.20