Finding the Fourth Proportional to 1,211.82, 1,672.82 and 819.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,211.82 : 1,672.82 = 819.37 : x
2. Step 2: Convert to fraction form
   1,211.82/1,672.82 = 819.37/x
3. Step 3: Cross multiply
   1,211.82x = 1,672.82 × 819.37
4. Step 4: Simplify right side
   1,211.82x = 1,370,658.52
5. Step 5: Solve for x
   x = 1,370,658.52/1,211.82
6. Step 6: Final answer
   x = 1,131.07