Finding the Fourth Proportional to 1,443.41, 2,164.89 and 518.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.41 : 2,164.89 = 518.95 : x
2. Step 2: Convert to fraction form
   1,443.41/2,164.89 = 518.95/x
3. Step 3: Cross multiply
   1,443.41x = 2,164.89 × 518.95
4. Step 4: Simplify right side
   1,443.41x = 1,123,469.67
5. Step 5: Solve for x
   x = 1,123,469.67/1,443.41
6. Step 6: Final answer
   x = 778.34