Finding the Fourth Proportional to 5,221.31, 7,205.42 and 2,863.46

Step by Step Solution

1. Step 1: Write the proportion equation
   5,221.31 : 7,205.42 = 2,863.46 : x
2. Step 2: Convert to fraction form
   5,221.31/7,205.42 = 2,863.46/x
3. Step 3: Cross multiply
   5,221.31x = 7,205.42 × 2,863.46
4. Step 4: Simplify right side
   5,221.31x = 20,632,435.65
5. Step 5: Solve for x
   x = 20,632,435.65/5,221.31
6. Step 6: Final answer
   x = 3,951.58