Finding the Fourth Proportional to 1,442.52, 2,164.17 and 518.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.52 : 2,164.17 = 518.18 : x
2. Step 2: Convert to fraction form
   1,442.52/2,164.17 = 518.18/x
3. Step 3: Cross multiply
   1,442.52x = 2,164.17 × 518.18
4. Step 4: Simplify right side
   1,442.52x = 1,121,429.61
5. Step 5: Solve for x
   x = 1,121,429.61/1,442.52
6. Step 6: Final answer
   x = 777.41