Finding the Fourth Proportional to 1,227.27, 1,839.57 and 611.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.27 : 1,839.57 = 611.43 : x
2. Step 2: Convert to fraction form
   1,227.27/1,839.57 = 611.43/x
3. Step 3: Cross multiply
   1,227.27x = 1,839.57 × 611.43
4. Step 4: Simplify right side
   1,227.27x = 1,124,768.29
5. Step 5: Solve for x
   x = 1,124,768.29/1,227.27
6. Step 6: Final answer
   x = 916.48