Finding the Fourth Proportional to 1,055.43, 1,456.48 and 613.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.43 : 1,456.48 = 613.37 : x
2. Step 2: Convert to fraction form
   1,055.43/1,456.48 = 613.37/x
3. Step 3: Cross multiply
   1,055.43x = 1,456.48 × 613.37
4. Step 4: Simplify right side
   1,055.43x = 893,365.55
5. Step 5: Solve for x
   x = 893,365.55/1,055.43
6. Step 6: Final answer
   x = 846.45