Finding the Third Proportional to 811,240 and 1,261,109

Step by Step Solution

1. Step 1: Write the proportion equation
   811,240 : 1,261,109 = 1,261,109 : x
2. Step 2: Convert to fraction form
   811,240/1,261,109 = 1,261,109/x
3. Step 3: Cross multiply
   811,240x = 1,261,109 × 1,261,109
4. Step 4: Simplify right side
   811,240x = 1,590,395,909,881
5. Step 5: Solve for x
   x = 1,590,395,909,881/811,240
6. Step 6: Final answer
   x = 1,960,450.56