Finding the Fourth Proportional to 867.34, 1,196.72 and 494.28

Step by Step Solution

1. Step 1: Write the proportion equation
   867.34 : 1,196.72 = 494.28 : x
2. Step 2: Convert to fraction form
   867.34/1,196.72 = 494.28/x
3. Step 3: Cross multiply
   867.34x = 1,196.72 × 494.28
4. Step 4: Simplify right side
   867.34x = 591,514.76
5. Step 5: Solve for x
   x = 591,514.76/867.34
6. Step 6: Final answer
   x = 681.99