Finding the Fourth Proportional to 1,443.09, 2,164.42 and 518.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.09 : 2,164.42 = 518.52 : x
2. Step 2: Convert to fraction form
   1,443.09/2,164.42 = 518.52/x
3. Step 3: Cross multiply
   1,443.09x = 2,164.42 × 518.52
4. Step 4: Simplify right side
   1,443.09x = 1,122,295.06
5. Step 5: Solve for x
   x = 1,122,295.06/1,443.09
6. Step 6: Final answer
   x = 777.70