Finding the Fourth Proportional to 1,055.07, 1,456.31 and 613.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.07 : 1,456.31 = 613.17 : x
2. Step 2: Convert to fraction form
   1,055.07/1,456.31 = 613.17/x
3. Step 3: Cross multiply
   1,055.07x = 1,456.31 × 613.17
4. Step 4: Simplify right side
   1,055.07x = 892,962.54
5. Step 5: Solve for x
   x = 892,962.54/1,055.07
6. Step 6: Final answer
   x = 846.35