Finding the Fourth Proportional to 1,443.33, 2,165.33 and 518.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.33 : 2,165.33 = 518.98 : x
2. Step 2: Convert to fraction form
   1,443.33/2,165.33 = 518.98/x
3. Step 3: Cross multiply
   1,443.33x = 2,165.33 × 518.98
4. Step 4: Simplify right side
   1,443.33x = 1,123,762.96
5. Step 5: Solve for x
   x = 1,123,762.96/1,443.33
6. Step 6: Final answer
   x = 778.59