Finding the Fourth Proportional to 1,056.20, 1,456.04 and 740.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.20 : 1,456.04 = 740.48 : x
2. Step 2: Convert to fraction form
   1,056.20/1,456.04 = 740.48/x
3. Step 3: Cross multiply
   1,056.20x = 1,456.04 × 740.48
4. Step 4: Simplify right side
   1,056.20x = 1,078,168.50
5. Step 5: Solve for x
   x = 1,078,168.50/1,056.20
6. Step 6: Final answer
   x = 1,020.80