Finding the Fourth Proportional to 1,010.59, 1,514.34 and 680.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.59 : 1,514.34 = 680.31 : x
2. Step 2: Convert to fraction form
   1,010.59/1,514.34 = 680.31/x
3. Step 3: Cross multiply
   1,010.59x = 1,514.34 × 680.31
4. Step 4: Simplify right side
   1,010.59x = 1,030,213.07
5. Step 5: Solve for x
   x = 1,030,213.07/1,010.59
6. Step 6: Final answer
   x = 1,019.42