Finding the Fourth Proportional to 1,144.06, 1,716.27 and 485.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.06 : 1,716.27 = 485.93 : x
2. Step 2: Convert to fraction form
   1,144.06/1,716.27 = 485.93/x
3. Step 3: Cross multiply
   1,144.06x = 1,716.27 × 485.93
4. Step 4: Simplify right side
   1,144.06x = 833,989.55
5. Step 5: Solve for x
   x = 833,989.55/1,144.06
6. Step 6: Final answer
   x = 728.98