Finding the Fourth Proportional to 2,171.31, 3,257.78 and 710.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.31 : 3,257.78 = 710.48 : x
2. Step 2: Convert to fraction form
   2,171.31/3,257.78 = 710.48/x
3. Step 3: Cross multiply
   2,171.31x = 3,257.78 × 710.48
4. Step 4: Simplify right side
   2,171.31x = 2,314,567.69
5. Step 5: Solve for x
   x = 2,314,567.69/2,171.31
6. Step 6: Final answer
   x = 1,065.98