Finding the Fourth Proportional to 2,819.40, 4,228.46 and 1,064.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.40 : 4,228.46 = 1,064.59 : x
2. Step 2: Convert to fraction form
   2,819.40/4,228.46 = 1,064.59/x
3. Step 3: Cross multiply
   2,819.40x = 4,228.46 × 1,064.59
4. Step 4: Simplify right side
   2,819.40x = 4,501,570.91
5. Step 5: Solve for x
   x = 4,501,570.91/2,819.40
6. Step 6: Final answer
   x = 1,596.64