Finding the Fourth Proportional to 1,131.24, 1,695.38 and 819.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.24 : 1,695.38 = 819.94 : x
2. Step 2: Convert to fraction form
   1,131.24/1,695.38 = 819.94/x
3. Step 3: Cross multiply
   1,131.24x = 1,695.38 × 819.94
4. Step 4: Simplify right side
   1,131.24x = 1,390,109.88
5. Step 5: Solve for x
   x = 1,390,109.88/1,131.24
6. Step 6: Final answer
   x = 1,228.84