Finding the Fourth Proportional to 1,055.61, 1,456.82 and 613.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.61 : 1,456.82 = 613.65 : x
2. Step 2: Convert to fraction form
   1,055.61/1,456.82 = 613.65/x
3. Step 3: Cross multiply
   1,055.61x = 1,456.82 × 613.65
4. Step 4: Simplify right side
   1,055.61x = 893,974.52
5. Step 5: Solve for x
   x = 893,974.52/1,055.61
6. Step 6: Final answer
   x = 846.88