Finding the Fourth Proportional to 1,055.18, 1,456.25 and 613.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.18 : 1,456.25 = 613.05 : x
2. Step 2: Convert to fraction form
   1,055.18/1,456.25 = 613.05/x
3. Step 3: Cross multiply
   1,055.18x = 1,456.25 × 613.05
4. Step 4: Simplify right side
   1,055.18x = 892,751.00
5. Step 5: Solve for x
   x = 892,751.00/1,055.18
6. Step 6: Final answer
   x = 846.07