Finding the Fourth Proportional to 1,049.72, 1,447.20 and 734.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.72 : 1,447.20 = 734.56 : x
2. Step 2: Convert to fraction form
   1,049.72/1,447.20 = 734.56/x
3. Step 3: Cross multiply
   1,049.72x = 1,447.20 × 734.56
4. Step 4: Simplify right side
   1,049.72x = 1,063,055.23
5. Step 5: Solve for x
   x = 1,063,055.23/1,049.72
6. Step 6: Final answer
   x = 1,012.70