Finding the Fourth Proportional to 1,429.89, 2,144.83 and 939.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.89 : 2,144.83 = 939.39 : x
2. Step 2: Convert to fraction form
   1,429.89/2,144.83 = 939.39/x
3. Step 3: Cross multiply
   1,429.89x = 2,144.83 × 939.39
4. Step 4: Simplify right side
   1,429.89x = 2,014,831.85
5. Step 5: Solve for x
   x = 2,014,831.85/1,429.89
6. Step 6: Final answer
   x = 1,409.08