Finding the Third Proportional to 686,818 and 1,050,639

Step by Step Solution

1. Step 1: Write the proportion equation
   686,818 : 1,050,639 = 1,050,639 : x
2. Step 2: Convert to fraction form
   686,818/1,050,639 = 1,050,639/x
3. Step 3: Cross multiply
   686,818x = 1,050,639 × 1,050,639
4. Step 4: Simplify right side
   686,818x = 1,103,842,308,321
5. Step 5: Solve for x
   x = 1,103,842,308,321/686,818
6. Step 6: Final answer
   x = 1,607,183.14