Finding the Fourth Proportional to 756.72, 1,044.72 and 712.98

Step by Step Solution

1. Step 1: Write the proportion equation
   756.72 : 1,044.72 = 712.98 : x
2. Step 2: Convert to fraction form
   756.72/1,044.72 = 712.98/x
3. Step 3: Cross multiply
   756.72x = 1,044.72 × 712.98
4. Step 4: Simplify right side
   756.72x = 744,864.47
5. Step 5: Solve for x
   x = 744,864.47/756.72
6. Step 6: Final answer
   x = 984.33