Finding the Fourth Proportional to 1,144.11, 1,715.25 and 1,079.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.11 : 1,715.25 = 1,079.72 : x
2. Step 2: Convert to fraction form
   1,144.11/1,715.25 = 1,079.72/x
3. Step 3: Cross multiply
   1,144.11x = 1,715.25 × 1,079.72
4. Step 4: Simplify right side
   1,144.11x = 1,851,989.73
5. Step 5: Solve for x
   x = 1,851,989.73/1,144.11
6. Step 6: Final answer
   x = 1,618.72