Finding the Fourth Proportional to 1,143.27, 1,577.73 and 671.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.27 : 1,577.73 = 671.05 : x
2. Step 2: Convert to fraction form
   1,143.27/1,577.73 = 671.05/x
3. Step 3: Cross multiply
   1,143.27x = 1,577.73 × 671.05
4. Step 4: Simplify right side
   1,143.27x = 1,058,740.21
5. Step 5: Solve for x
   x = 1,058,740.21/1,143.27
6. Step 6: Final answer
   x = 926.06