Finding the Fourth Proportional to 1,140.27, 1,573.57 and 616.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.27 : 1,573.57 = 616.30 : x
2. Step 2: Convert to fraction form
   1,140.27/1,573.57 = 616.30/x
3. Step 3: Cross multiply
   1,140.27x = 1,573.57 × 616.30
4. Step 4: Simplify right side
   1,140.27x = 969,789.65
5. Step 5: Solve for x
   x = 969,789.65/1,140.27
6. Step 6: Final answer
   x = 850.49