Finding the Third Proportional to 707,680 and 1,040,640

Step by Step Solution

1. Step 1: Write the proportion equation
   707,680 : 1,040,640 = 1,040,640 : x
2. Step 2: Convert to fraction form
   707,680/1,040,640 = 1,040,640/x
3. Step 3: Cross multiply
   707,680x = 1,040,640 × 1,040,640
4. Step 4: Simplify right side
   707,680x = 1,082,931,609,600
5. Step 5: Solve for x
   x = 1,082,931,609,600/707,680
6. Step 6: Final answer
   x = 1,530,256.06