Finding the Fourth Proportional to 2,819.90, 4,228.67 and 1,064.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.90 : 4,228.67 = 1,064.61 : x
2. Step 2: Convert to fraction form
   2,819.90/4,228.67 = 1,064.61/x
3. Step 3: Cross multiply
   2,819.90x = 4,228.67 × 1,064.61
4. Step 4: Simplify right side
   2,819.90x = 4,501,887.03
5. Step 5: Solve for x
   x = 4,501,887.03/2,819.90
6. Step 6: Final answer
   x = 1,596.47