Finding the Fourth Proportional to 1,086.89, 1,629.71 and 494.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.89 : 1,629.71 = 494.13 : x
2. Step 2: Convert to fraction form
   1,086.89/1,629.71 = 494.13/x
3. Step 3: Cross multiply
   1,086.89x = 1,629.71 × 494.13
4. Step 4: Simplify right side
   1,086.89x = 805,282.78
5. Step 5: Solve for x
   x = 805,282.78/1,086.89
6. Step 6: Final answer
   x = 740.90