Finding the Fourth Proportional to 2,851.03, 4,272.27 and 1,290.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,851.03 : 4,272.27 = 1,290.16 : x
2. Step 2: Convert to fraction form
   2,851.03/4,272.27 = 1,290.16/x
3. Step 3: Cross multiply
   2,851.03x = 4,272.27 × 1,290.16
4. Step 4: Simplify right side
   2,851.03x = 5,511,911.86
5. Step 5: Solve for x
   x = 5,511,911.86/2,851.03
6. Step 6: Final answer
   x = 1,933.31