Finding the Fourth Proportional to 3,921.22, 5,406.92 and 3,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.22 : 5,406.92 = 3,830.50 : x
2. Step 2: Convert to fraction form
   3,921.22/5,406.92 = 3,830.50/x
3. Step 3: Cross multiply
   3,921.22x = 5,406.92 × 3,830.50
4. Step 4: Simplify right side
   3,921.22x = 20,711,180.03
5. Step 5: Solve for x
   x = 20,711,180.03/3,921.22
6. Step 6: Final answer
   x = 5,281.83