Finding the Fourth Proportional to 3,219.52, 4,443.31 and 1,961.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,219.52 : 4,443.31 = 1,961.31 : x
2. Step 2: Convert to fraction form
   3,219.52/4,443.31 = 1,961.31/x
3. Step 3: Cross multiply
   3,219.52x = 4,443.31 × 1,961.31
4. Step 4: Simplify right side
   3,219.52x = 8,714,708.34
5. Step 5: Solve for x
   x = 8,714,708.34/3,219.52
6. Step 6: Final answer
   x = 2,706.83