Finding the Fourth Proportional to 2,160.35, 3,240.83 and 1,064.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.35 : 3,240.83 = 1,064.78 : x
2. Step 2: Convert to fraction form
   2,160.35/3,240.83 = 1,064.78/x
3. Step 3: Cross multiply
   2,160.35x = 3,240.83 × 1,064.78
4. Step 4: Simplify right side
   2,160.35x = 3,450,757.43
5. Step 5: Solve for x
   x = 3,450,757.43/2,160.35
6. Step 6: Final answer
   x = 1,597.32