Finding the Fourth Proportional to 1,351.20, 1,863 and 1,018.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.20 : 1,863 = 1,018.56 : x
2. Step 2: Convert to fraction form
   1,351.20/1,863 = 1,018.56/x
3. Step 3: Cross multiply
   1,351.20x = 1,863 × 1,018.56
4. Step 4: Simplify right side
   1,351.20x = 1,897,577.28
5. Step 5: Solve for x
   x = 1,897,577.28/1,351.20
6. Step 6: Final answer
   x = 1,404.36