Finding the Third Proportional to 686,840 and 1,504,900

Step by Step Solution

1. Step 1: Write the proportion equation
   686,840 : 1,504,900 = 1,504,900 : x
2. Step 2: Convert to fraction form
   686,840/1,504,900 = 1,504,900/x
3. Step 3: Cross multiply
   686,840x = 1,504,900 × 1,504,900
4. Step 4: Simplify right side
   686,840x = 2,264,724,010,000
5. Step 5: Solve for x
   x = 2,264,724,010,000/686,840
6. Step 6: Final answer
   x = 3,297,309.43