Finding the Fourth Proportional to 1,657.59, 2,287.41 and 911.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,657.59 : 2,287.41 = 911.54 : x
2. Step 2: Convert to fraction form
   1,657.59/2,287.41 = 911.54/x
3. Step 3: Cross multiply
   1,657.59x = 2,287.41 × 911.54
4. Step 4: Simplify right side
   1,657.59x = 2,085,054.27
5. Step 5: Solve for x
   x = 2,085,054.27/1,657.59
6. Step 6: Final answer
   x = 1,257.88