Finding the Fourth Proportional to 1,608.82, 2,219.91 and 910.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.82 : 2,219.91 = 910.18 : x
2. Step 2: Convert to fraction form
   1,608.82/2,219.91 = 910.18/x
3. Step 3: Cross multiply
   1,608.82x = 2,219.91 × 910.18
4. Step 4: Simplify right side
   1,608.82x = 2,020,517.68
5. Step 5: Solve for x
   x = 2,020,517.68/1,608.82
6. Step 6: Final answer
   x = 1,255.90