Finding the Third Proportional to 719.72 and 1,040.34

Step by Step Solution

1. Step 1: Write the proportion equation
   719.72 : 1,040.34 = 1,040.34 : x
2. Step 2: Convert to fraction form
   719.72/1,040.34 = 1,040.34/x
3. Step 3: Cross multiply
   719.72x = 1,040.34 × 1,040.34
4. Step 4: Simplify right side
   719.72x = 1,082,315.12
5. Step 5: Solve for x
   x = 1,082,315.12/719.72
6. Step 6: Final answer
   x = 1,503.80