Finding the Fourth Proportional to 1,290.18, 1,935.82 and 828.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.18 : 1,935.82 = 828.48 : x
2. Step 2: Convert to fraction form
   1,290.18/1,935.82 = 828.48/x
3. Step 3: Cross multiply
   1,290.18x = 1,935.82 × 828.48
4. Step 4: Simplify right side
   1,290.18x = 1,603,788.15
5. Step 5: Solve for x
   x = 1,603,788.15/1,290.18
6. Step 6: Final answer
   x = 1,243.07