Finding the Fourth Proportional to 1,055.43, 1,456.38 and 740.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.43 : 1,456.38 = 740.34 : x
2. Step 2: Convert to fraction form
   1,055.43/1,456.38 = 740.34/x
3. Step 3: Cross multiply
   1,055.43x = 1,456.38 × 740.34
4. Step 4: Simplify right side
   1,055.43x = 1,078,216.37
5. Step 5: Solve for x
   x = 1,078,216.37/1,055.43
6. Step 6: Final answer
   x = 1,021.59