Finding the Fourth Proportional to 1,255.50, 1,885.38 and 817.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,255.50 : 1,885.38 = 817.49 : x
2. Step 2: Convert to fraction form
   1,255.50/1,885.38 = 817.49/x
3. Step 3: Cross multiply
   1,255.50x = 1,885.38 × 817.49
4. Step 4: Simplify right side
   1,255.50x = 1,541,280.94
5. Step 5: Solve for x
   x = 1,541,280.94/1,255.50
6. Step 6: Final answer
   x = 1,227.62