Finding the Fourth Proportional to 1,443.02, 2,164.83 and 518.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.02 : 2,164.83 = 518.65 : x
2. Step 2: Convert to fraction form
   1,443.02/2,164.83 = 518.65/x
3. Step 3: Cross multiply
   1,443.02x = 2,164.83 × 518.65
4. Step 4: Simplify right side
   1,443.02x = 1,122,793.90
5. Step 5: Solve for x
   x = 1,122,793.90/1,443.02
6. Step 6: Final answer
   x = 778.09