Finding the Fourth Proportional to 1,141.29, 1,710.56 and 447.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.29 : 1,710.56 = 447.53 : x
2. Step 2: Convert to fraction form
   1,141.29/1,710.56 = 447.53/x
3. Step 3: Cross multiply
   1,141.29x = 1,710.56 × 447.53
4. Step 4: Simplify right side
   1,141.29x = 765,519.48
5. Step 5: Solve for x
   x = 765,519.48/1,141.29
6. Step 6: Final answer
   x = 670.75