Finding the Fourth Proportional to 1,636.83, 2,258.65 and 928.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.83 : 2,258.65 = 928.59 : x
2. Step 2: Convert to fraction form
   1,636.83/2,258.65 = 928.59/x
3. Step 3: Cross multiply
   1,636.83x = 2,258.65 × 928.59
4. Step 4: Simplify right side
   1,636.83x = 2,097,359.80
5. Step 5: Solve for x
   x = 2,097,359.80/1,636.83
6. Step 6: Final answer
   x = 1,281.35