Finding the Fourth Proportional to 1,055.83, 1,456.88 and 613.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.83 : 1,456.88 = 613.75 : x
2. Step 2: Convert to fraction form
   1,055.83/1,456.88 = 613.75/x
3. Step 3: Cross multiply
   1,055.83x = 1,456.88 × 613.75
4. Step 4: Simplify right side
   1,055.83x = 894,160.10
5. Step 5: Solve for x
   x = 894,160.10/1,055.83
6. Step 6: Final answer
   x = 846.88