Finding the Third Proportional to 641,240 and 1,000,680

Step by Step Solution

1. Step 1: Write the proportion equation
   641,240 : 1,000,680 = 1,000,680 : x
2. Step 2: Convert to fraction form
   641,240/1,000,680 = 1,000,680/x
3. Step 3: Cross multiply
   641,240x = 1,000,680 × 1,000,680
4. Step 4: Simplify right side
   641,240x = 1,001,360,462,400
5. Step 5: Solve for x
   x = 1,001,360,462,400/641,240
6. Step 6: Final answer
   x = 1,561,600.12