Finding the Fourth Proportional to 1,055.47, 1,456.55 and 583.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.47 : 1,456.55 = 583.39 : x
2. Step 2: Convert to fraction form
   1,055.47/1,456.55 = 583.39/x
3. Step 3: Cross multiply
   1,055.47x = 1,456.55 × 583.39
4. Step 4: Simplify right side
   1,055.47x = 849,733.79
5. Step 5: Solve for x
   x = 849,733.79/1,055.47
6. Step 6: Final answer
   x = 805.08