Finding the Third Proportional to 756,686 and 1,261,145

Step by Step Solution

1. Step 1: Write the proportion equation
   756,686 : 1,261,145 = 1,261,145 : x
2. Step 2: Convert to fraction form
   756,686/1,261,145 = 1,261,145/x
3. Step 3: Cross multiply
   756,686x = 1,261,145 × 1,261,145
4. Step 4: Simplify right side
   756,686x = 1,590,486,711,025
5. Step 5: Solve for x
   x = 1,590,486,711,025/756,686
6. Step 6: Final answer
   x = 2,101,911.11