Finding the Fourth Proportional to 1,456.89, 2,181.83 and 908.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.89 : 2,181.83 = 908.39 : x
2. Step 2: Convert to fraction form
   1,456.89/2,181.83 = 908.39/x
3. Step 3: Cross multiply
   1,456.89x = 2,181.83 × 908.39
4. Step 4: Simplify right side
   1,456.89x = 1,981,937.10
5. Step 5: Solve for x
   x = 1,981,937.10/1,456.89
6. Step 6: Final answer
   x = 1,360.39