Finding the Third Proportional to 686,839.50 and 1,510,707

Step by Step Solution

1. Step 1: Write the proportion equation
   686,839.50 : 1,510,707 = 1,510,707 : x
2. Step 2: Convert to fraction form
   686,839.50/1,510,707 = 1,510,707/x
3. Step 3: Cross multiply
   686,839.50x = 1,510,707 × 1,510,707
4. Step 4: Simplify right side
   686,839.50x = 2,282,235,639,849
5. Step 5: Solve for x
   x = 2,282,235,639,849/686,839.50
6. Step 6: Final answer
   x = 3,322,807.79