Finding the Fourth Proportional to 1,443.32, 2,164.25 and 518.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.32 : 2,164.25 = 518.73 : x
2. Step 2: Convert to fraction form
   1,443.32/2,164.25 = 518.73/x
3. Step 3: Cross multiply
   1,443.32x = 2,164.25 × 518.73
4. Step 4: Simplify right side
   1,443.32x = 1,122,658.81
5. Step 5: Solve for x
   x = 1,122,658.81/1,443.32
6. Step 6: Final answer
   x = 777.83