Finding the Fourth Proportional to 1,443.56, 2,164.77 and 518.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.56 : 2,164.77 = 518.94 : x
2. Step 2: Convert to fraction form
   1,443.56/2,164.77 = 518.94/x
3. Step 3: Cross multiply
   1,443.56x = 2,164.77 × 518.94
4. Step 4: Simplify right side
   1,443.56x = 1,123,385.74
5. Step 5: Solve for x
   x = 1,123,385.74/1,443.56
6. Step 6: Final answer
   x = 778.21