Finding the Fourth Proportional to 1,443.96, 2,164.38 and 519.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.96 : 2,164.38 = 519.18 : x
2. Step 2: Convert to fraction form
   1,443.96/2,164.38 = 519.18/x
3. Step 3: Cross multiply
   1,443.96x = 2,164.38 × 519.18
4. Step 4: Simplify right side
   1,443.96x = 1,123,702.81
5. Step 5: Solve for x
   x = 1,123,702.81/1,443.96
6. Step 6: Final answer
   x = 778.21