Finding the Fourth Proportional to 1,096.20, 1,514.74 and 817.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.20 : 1,514.74 = 817.56 : x
2. Step 2: Convert to fraction form
   1,096.20/1,514.74 = 817.56/x
3. Step 3: Cross multiply
   1,096.20x = 1,514.74 × 817.56
4. Step 4: Simplify right side
   1,096.20x = 1,238,390.83
5. Step 5: Solve for x
   x = 1,238,390.83/1,096.20
6. Step 6: Final answer
   x = 1,129.71