Finding the Fourth Proportional to 2,170.50, 3,255.82 and 709.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.50 : 3,255.82 = 709.78 : x
2. Step 2: Convert to fraction form
   2,170.50/3,255.82 = 709.78/x
3. Step 3: Cross multiply
   2,170.50x = 3,255.82 × 709.78
4. Step 4: Simplify right side
   2,170.50x = 2,310,915.92
5. Step 5: Solve for x
   x = 2,310,915.92/2,170.50
6. Step 6: Final answer
   x = 1,064.69