Finding the Fourth Proportional to 1,055.48, 1,456.46 and 613.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.48 : 1,456.46 = 613.42 : x
2. Step 2: Convert to fraction form
   1,055.48/1,456.46 = 613.42/x
3. Step 3: Cross multiply
   1,055.48x = 1,456.46 × 613.42
4. Step 4: Simplify right side
   1,055.48x = 893,421.69
5. Step 5: Solve for x
   x = 893,421.69/1,055.48
6. Step 6: Final answer
   x = 846.46