Finding the Fourth Proportional to 1,055.72, 1,455.48 and 740.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.72 : 1,455.48 = 740.56 : x
2. Step 2: Convert to fraction form
   1,055.72/1,455.48 = 740.56/x
3. Step 3: Cross multiply
   1,055.72x = 1,455.48 × 740.56
4. Step 4: Simplify right side
   1,055.72x = 1,077,870.27
5. Step 5: Solve for x
   x = 1,077,870.27/1,055.72
6. Step 6: Final answer
   x = 1,020.98