Finding the Fourth Proportional to 1,055.23, 1,456.15 and 613.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.23 : 1,456.15 = 613.06 : x
2. Step 2: Convert to fraction form
   1,055.23/1,456.15 = 613.06/x
3. Step 3: Cross multiply
   1,055.23x = 1,456.15 × 613.06
4. Step 4: Simplify right side
   1,055.23x = 892,707.32
5. Step 5: Solve for x
   x = 892,707.32/1,055.23
6. Step 6: Final answer
   x = 845.98