Finding the Fourth Proportional to 1,143.56, 1,577.86 and 671.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.56 : 1,577.86 = 671.33 : x
2. Step 2: Convert to fraction form
   1,143.56/1,577.86 = 671.33/x
3. Step 3: Cross multiply
   1,143.56x = 1,577.86 × 671.33
4. Step 4: Simplify right side
   1,143.56x = 1,059,255.19
5. Step 5: Solve for x
   x = 1,059,255.19/1,143.56
6. Step 6: Final answer
   x = 926.28