Finding the Fourth Proportional to 4,636.81, 6,395.30 and 3,220.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,636.81 : 6,395.30 = 3,220.50 : x
2. Step 2: Convert to fraction form
   4,636.81/6,395.30 = 3,220.50/x
3. Step 3: Cross multiply
   4,636.81x = 6,395.30 × 3,220.50
4. Step 4: Simplify right side
   4,636.81x = 20,596,047.72
5. Step 5: Solve for x
   x = 20,596,047.72/4,636.81
6. Step 6: Final answer
   x = 4,441.86