Finding the Fourth Proportional to 1,514.78, 2,090.30 and 851.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,514.78 : 2,090.30 = 851.59 : x
2. Step 2: Convert to fraction form
   1,514.78/2,090.30 = 851.59/x
3. Step 3: Cross multiply
   1,514.78x = 2,090.30 × 851.59
4. Step 4: Simplify right side
   1,514.78x = 1,780,078.58
5. Step 5: Solve for x
   x = 1,780,078.58/1,514.78
6. Step 6: Final answer
   x = 1,175.14