Finding the Fourth Proportional to 6,499.49, 9,747.49 and 3,211.70

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499.49 : 9,747.49 = 3,211.70 : x
2. Step 2: Convert to fraction form
   6,499.49/9,747.49 = 3,211.70/x
3. Step 3: Cross multiply
   6,499.49x = 9,747.49 × 3,211.70
4. Step 4: Simplify right side
   6,499.49x = 31,306,017.72
5. Step 5: Solve for x
   x = 31,306,017.72/6,499.49
6. Step 6: Final answer
   x = 4,816.69