Finding the Fourth Proportional to 1,636.75, 2,258.72 and 938.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.75 : 2,258.72 = 938.59 : x
2. Step 2: Convert to fraction form
   1,636.75/2,258.72 = 938.59/x
3. Step 3: Cross multiply
   1,636.75x = 2,258.72 × 938.59
4. Step 4: Simplify right side
   1,636.75x = 2,120,012.00
5. Step 5: Solve for x
   x = 2,120,012.00/1,636.75
6. Step 6: Final answer
   x = 1,295.26