Finding the Third Proportional to 720 and 1,042.88

Step by Step Solution

1. Step 1: Write the proportion equation
   720 : 1,042.88 = 1,042.88 : x
2. Step 2: Convert to fraction form
   720/1,042.88 = 1,042.88/x
3. Step 3: Cross multiply
   720x = 1,042.88 × 1,042.88
4. Step 4: Simplify right side
   720x = 1,087,588.27
5. Step 5: Solve for x
   x = 1,087,588.27/720
6. Step 6: Final answer
   x = 1,510.54