Finding the Fourth Proportional to 1,139.94, 1,709.31 and 671.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.94 : 1,709.31 = 671.52 : x
2. Step 2: Convert to fraction form
   1,139.94/1,709.31 = 671.52/x
3. Step 3: Cross multiply
   1,139.94x = 1,709.31 × 671.52
4. Step 4: Simplify right side
   1,139.94x = 1,147,835.85
5. Step 5: Solve for x
   x = 1,147,835.85/1,139.94
6. Step 6: Final answer
   x = 1,006.93