Finding the Third Proportional to 686,740 and 1,010,255

Step by Step Solution

1. Step 1: Write the proportion equation
   686,740 : 1,010,255 = 1,010,255 : x
2. Step 2: Convert to fraction form
   686,740/1,010,255 = 1,010,255/x
3. Step 3: Cross multiply
   686,740x = 1,010,255 × 1,010,255
4. Step 4: Simplify right side
   686,740x = 1,020,615,165,025
5. Step 5: Solve for x
   x = 1,020,615,165,025/686,740
6. Step 6: Final answer
   x = 1,486,174.05