Finding the Fourth Proportional to 5,706.31, 7,874.72 and 3,222.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,706.31 : 7,874.72 = 3,222.31 : x
2. Step 2: Convert to fraction form
   5,706.31/7,874.72 = 3,222.31/x
3. Step 3: Cross multiply
   5,706.31x = 7,874.72 × 3,222.31
4. Step 4: Simplify right side
   5,706.31x = 25,374,789.00
5. Step 5: Solve for x
   x = 25,374,789.00/5,706.31
6. Step 6: Final answer
   x = 4,446.79