Finding the Fourth Proportional to 2,170.69, 3,255.30 and 709.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.69 : 3,255.30 = 709.50 : x
2. Step 2: Convert to fraction form
   2,170.69/3,255.30 = 709.50/x
3. Step 3: Cross multiply
   2,170.69x = 3,255.30 × 709.50
4. Step 4: Simplify right side
   2,170.69x = 2,309,617.30
5. Step 5: Solve for x
   x = 2,309,617.30/2,170.69
6. Step 6: Final answer
   x = 1,064.00