Finding the Fourth Proportional to 1,144.24, 1,715.13 and 818.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.24 : 1,715.13 = 818.62 : x
2. Step 2: Convert to fraction form
   1,144.24/1,715.13 = 818.62/x
3. Step 3: Cross multiply
   1,144.24x = 1,715.13 × 818.62
4. Step 4: Simplify right side
   1,144.24x = 1,404,038.50
5. Step 5: Solve for x
   x = 1,404,038.50/1,144.24
6. Step 6: Final answer
   x = 1,227.05