Finding the Fourth Proportional to 1,055.60, 1,456.94 and 613.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.60 : 1,456.94 = 613.47 : x
2. Step 2: Convert to fraction form
   1,055.60/1,456.94 = 613.47/x
3. Step 3: Cross multiply
   1,055.60x = 1,456.94 × 613.47
4. Step 4: Simplify right side
   1,055.60x = 893,790.52
5. Step 5: Solve for x
   x = 893,790.52/1,055.60
6. Step 6: Final answer
   x = 846.72