Finding the Third Proportional to 686,830 and 1,050,660

Step by Step Solution

1. Step 1: Write the proportion equation
   686,830 : 1,050,660 = 1,050,660 : x
2. Step 2: Convert to fraction form
   686,830/1,050,660 = 1,050,660/x
3. Step 3: Cross multiply
   686,830x = 1,050,660 × 1,050,660
4. Step 4: Simplify right side
   686,830x = 1,103,886,435,600
5. Step 5: Solve for x
   x = 1,103,886,435,600/686,830
6. Step 6: Final answer
   x = 1,607,219.31