Finding the Fourth Proportional to 1,010.82, 1,514.75 and 548.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.82 : 1,514.75 = 548.31 : x
2. Step 2: Convert to fraction form
   1,010.82/1,514.75 = 548.31/x
3. Step 3: Cross multiply
   1,010.82x = 1,514.75 × 548.31
4. Step 4: Simplify right side
   1,010.82x = 830,549.83
5. Step 5: Solve for x
   x = 830,549.83/1,010.82
6. Step 6: Final answer
   x = 821.66