Finding the Fourth Proportional to 1,144.17, 1,713.86 and 731.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.17 : 1,713.86 = 731.21 : x
2. Step 2: Convert to fraction form
   1,144.17/1,713.86 = 731.21/x
3. Step 3: Cross multiply
   1,144.17x = 1,713.86 × 731.21
4. Step 4: Simplify right side
   1,144.17x = 1,253,182.09
5. Step 5: Solve for x
   x = 1,253,182.09/1,144.17
6. Step 6: Final answer
   x = 1,095.28