Finding the Fourth Proportional to 1,636.82, 2,258.94 and 938.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.82 : 2,258.94 = 938.18 : x
2. Step 2: Convert to fraction form
   1,636.82/2,258.94 = 938.18/x
3. Step 3: Cross multiply
   1,636.82x = 2,258.94 × 938.18
4. Step 4: Simplify right side
   1,636.82x = 2,119,292.33
5. Step 5: Solve for x
   x = 2,119,292.33/1,636.82
6. Step 6: Final answer
   x = 1,294.76