Finding the Third Proportional to 686,319 and 1,034,880

Step by Step Solution

1. Step 1: Write the proportion equation
   686,319 : 1,034,880 = 1,034,880 : x
2. Step 2: Convert to fraction form
   686,319/1,034,880 = 1,034,880/x
3. Step 3: Cross multiply
   686,319x = 1,034,880 × 1,034,880
4. Step 4: Simplify right side
   686,319x = 1,070,976,614,400
5. Step 5: Solve for x
   x = 1,070,976,614,400/686,319
6. Step 6: Final answer
   x = 1,560,464.76