Finding the Third Proportional to 641,574 and 1,298,700

Step by Step Solution

1. Step 1: Write the proportion equation
   641,574 : 1,298,700 = 1,298,700 : x
2. Step 2: Convert to fraction form
   641,574/1,298,700 = 1,298,700/x
3. Step 3: Cross multiply
   641,574x = 1,298,700 × 1,298,700
4. Step 4: Simplify right side
   641,574x = 1,686,621,690,000
5. Step 5: Solve for x
   x = 1,686,621,690,000/641,574
6. Step 6: Final answer
   x = 2,628,880.99