Finding the Fourth Proportional to 1,055.47, 1,456.33 and 613.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.47 : 1,456.33 = 613.15 : x
2. Step 2: Convert to fraction form
   1,055.47/1,456.33 = 613.15/x
3. Step 3: Cross multiply
   1,055.47x = 1,456.33 × 613.15
4. Step 4: Simplify right side
   1,055.47x = 892,948.74
5. Step 5: Solve for x
   x = 892,948.74/1,055.47
6. Step 6: Final answer
   x = 846.02